Not a mechanical fan either, but one thing I have noticed on many hits on video around YT is that many archers/crossbow shooters shooting mechanicals, seem to pull shots way back from the shoulder, and call the shot a double lung out loud on film. When you have dressed as many deer as I have, you're like, negative... you center punched the liver. This is actually the location where a terribly marginal hit with a small broadhead, can actually be overcome by the giant cutting width of a mechanical, BUT... you are still gonna have weak blood trails on liver hits, and LOOONG tracking jobs with hours of waiting before picking up the trail, and many times, if you find it, a dead animal that has been chewed on by coyotes.

Makes perfect sense! And very helpful. I replaced my twizzlers that had mechanicals, because of the info you’ve been posting, because my arrows didn’t pass through on a couple of deer.( Where I hit, they should have.) The Hunting Public got me turned on to your videos. So I used a heavier arrow with cut on contact broadheads.(2 blade with bleeders). I’ve only got to shoot one deer, and it didn’t actually pass through. It did break directly through a rib entering, through lung, through backbone(severing the spine). Must have deflected up some after hitting the rib. I was hunting the ground shooting uphill as well. I could see the arrow trying to poke through the hide opposite side. The deer fell over and died in less than 10 seconds. The moral of the story: Thank you and, maybe, in case same scenario occurs, I’ll go heavier w/ single bevel 2 blade for a pass through, and for the fun of it.

you know I stop watching your videos for awhile then I start thinking about switching back to mechanicals get a little hyped thinking about trying a new one then I watch one of your vids and I change my mind

Missed you man! Thank you for taking the time to put this together! It was good info!

Your discussion with the rocket man was superb (all of them) you are a asset to the sport. Thankyou.

Love your work Troy. We owe it to our quarry to make our best effort to be humane. Also, yes THEY are going to come after us someday. I’m convinced that a large majority of people are just LAZY and take tuning for perfect arrow flight for granted. Also the guys who think 250 fps vs 290 is going to make the difference in “string jump”. One thing I wonder is, does your radar give flight time? If so, maybe a video showing a graph of not only these trajectories, visually, but also flight time. But even that isn’t going to defeat lazy, or stubbornness.

I work with a guy who just lost a buck from a rage broadheat hitting bone. I got to hunt this year on short notice, and used the broadheads I could get which were 150gr magnus stingers. Zipped a 500gr bolt through both lungs and he piled up in about 40 yards, no tracking needed. The damage to his lungs was what sold it though. Heavier arrows and bolts with proper broadheads works. I got a 10 point buck that stands as testimony to that.

Love it. Keep them coming

Thank you for putting all this work in!

Another great video. A couple of thoughts for growing the knowledge base by capturing interest. 1. You guys should develop a speed and ke calculator that is accurate. Heck, just start with speed. Many know (or should) heavy arrows throw speed calculators for a loop. A bow that appears to shoot well over ibo with a 600gr arrow is actually under marketed ibo with a true 350gr arrow. 2. I mentioned this to the rocket man in a comment to, I believe, a THP video. You guys really need a high-speed camera. No channel does this. Pics are worth a thousand words, and people love slow-motion stuff. Arrow flight (flex at launch, rotation, corkscrewing), shaft behavior on impact, partial penetration, and behavior after pass could be shown. Regards to KE. Point camera at pigs face, put graduated chart behind pig, then see and calculate ke, reduction in velocity, shaft behavior, and on and on. Get a high-speed camera and start using it. It would be gold for your channel and the foundation. The factual data generated would be incredible because we could see it. We could see the mech blades start to deploy and see their location and condition on the way out.

I’ve watched all of your videos and tried just about everything. For deer and 200lb hogs here in north east Texas I have found 475-550 grains with above 15% Foc and perfect arrow flight will blow through any shoulder. Single bevel splits the bone 3 and 4 blade 1 piece broad heads bust the bone. The Ranch fairy preaches to shoot the heaviest arrow that you can live with the trajectory. I shoot Victory rip xv’s ethics insert outserts. 250-285 grains up front. They are tough and deadly. Thank you for all the awesome research that you do!! Best resource for archery on youtube

I'm glad you show this. I've shot a bunch of brands but never the flippers. Always came back to 2 blades

One day cave man sharpens stick on rock. cave man hunts with sharp stick. cave man learns to fire harden. One day cave man breaks a stone and sliced his finger open 🤔 cave man put stone on stick. Stick fly way better when throw it “Foc”. Cave men were geniuses and didn’t even know it and here we are trying to explain with the best technology man has ever had that going back to the unbalanced stick with a crap point doesn’t work as good. Keep it up Troy!

Another excellent video. Thank you. I have a suggestion for you and Rocket Man. Given you have essentially an unlimited supply of test subjects and can take them all year. Perhaps set up your target (whatever carcass it may be) with a high speed camera at 90 degrees to the arrow travel and accurate alternating vertical one inch black and white bars situated so the camera can see the carcass and the bars. Given you have the weight of the arrow and the impact velocity you also have the impact KE. One could use math to determine the exit velocity (if it exits) by measuring how quickly the arrow passes over the alternating bars. Then one can determine the remaining KE as the arrow exits and therefore determine the amount of KE used to deploy and pass through with the mechanical broadhead. As an aside, one could also use the same method to determine how much KE is used by cut on contact broadheads. Replaceable blade, two blade, three blade and single bevel blades etc. It would be a lot of work but it would be cool to know. It might also be the first baseline data set for broadhead penetration efficiency. The same type of data set from Dr Ed Ashby although he was limited to arrow penetration. You would have the math to support his research. Of course one would need to shoot and record multiple shots while using multiple carcasses in order to obtain reasonably accurate data so the perfectionists have less reason to quibble.

Thanks, good work.

Great content!!! As you know, some people don't seem to like FACTS and the TRUTH! BUT---Many of us would Prefer it! 🏹🏹🏹

Before I found your channel, my mechanical broadhead performance was 7/10 worked as it should. After I started using Ultra FOC arrows that are 650gr my schwacker performance has been 10/10 now. EDIT: It is 10/10 across the board. No bones, ribs only, shoulder blades and ribs, ball joint and ribs, Ive hit it all now and I always get complete pass through. Flinging my 650gr 30% foc arrows at 270fps.

Thank you for the work you do to continue to educate and better us bowhunters. Even if it's annoying lol

Hey buddy yet another very informative video Troy keep up the good work mate I'm just gearing up for my next hunting trip going through Victoria Australia and New South Wales Australia again chassing red and fallow deer & mountain boar's my buddies Milton & Chris we'll be on the road for around 8 weeks of hunting and lot's of miles traveling around any way cheers buddy take care and happy hunting n fishing for you brother

Physisit and data analyst here.. THANK YOU for these videos! I’ve been talking about it for years to anyone that will listen. I have a google sheets model with trajectory visuals for my buddies to compare flight characteristics and it got them all onboard too

Been shooting the 200 grain single bevel tuffhead evolution practicing shoots like a dart!!! Shooting into old lake styrofoam about five times brought it in the house and could still shave paper amazing I stopped it a few times and it whispers through fantastic edge integrity thanks 👍 can't wait to kill something

It would be interesting to see how much speed/ke is lost going through an animal by putting the radar just at exit. Obviously the results will vary due to the arrow setup but some baseline ideas would be cool to know, as well as seeing the differences in each setup.

Awesome videos!! Have changed the whole world of bow hunting for me!! Very educational and entertaining lol your sarcasm is priceless gets me laughing every time 🤣. Would love to come stick some pigs with you if I make it to Texas lol. Keep up the awesome videos and thanks

Dunno about you, i mostly watch Ranch Fairy videos for the awesome music. Oh, and the information is kinda interesting and useful, too.

To be honest, I could care less about the meat. The parts I care about are getting through the bones, specifically arms/shoulders/ and ribs. Great work there Darrel and Troy.

I shoot out west. I still stick to closer ranges because I'm not perfect. I've taken follow-up shots to put a second hole in an animal when presented with the opportunity at 70 yards. But the farthest initial shot I've ever taken was 49 yards two years ago. I don't use blinds or stands, though; so most of my shots take place between 25-35 yards. And that's typically after a nice slow stalk. The "out west" hunters you referenced sound like they use "product" in their hair and buy their jeans already ripped. Troy, thank you. The information you present is valid, and it surprises me that so many people lack common sense. Even with graphs, data, math, and a 30-minute knowledge bomb dropped on them... I find it funny that so many people refuse to accept that mechanics and light arrows simply do not perform as well as they were promised ON THE PACKAGING. (Designed to get you to part with your hard earned money and give it to them, by the way...) Mechanicals have their place. I keep one, and only one in my quiver... it's for that rare follow-up shot on an animal I already wounded after it ran another 40-60 yards... Because even out of a properly tuned bow and with a properly tuned arrow, a SEVR 1.5 still flies more true than a Kudu Point Contour+. And even 3 holes in an animal is better than 2. Keep doing what you do, Troy.

I am converting from trad to compound this year after a shoulder injury. I cannot hold the struggle stick like i used to. Always shot heavy arrows, with High FOC, and a sturdy and sharp cut on contact fixed blade in that world. It was a given. Low KE from the longbow/recurves demand it. I find it strange that people would even want to risk something going wrong at the animal with a mechanical. I also find it strange that in the compound arena, people think the physics somehow changes, or that the extra energy allows for more room for tinkering with the physics. I plan to continue with the same types of arrows I used to fling (correctly spined and heavy), just out of a faster, more efficient bow. If trajectory is the issue, shoot more and practice.

You may not like this type of content but you're the only guy that keeps showing data on KZfaq so please keep it up. I am pretty analytical and I enjoy this type of content, I don't like all the opinion-BASED content, I want data to support a concept. I haven't seen data-driven content supporting 15% f.o.c. lightweight arrows, specifically, which is what I'm interested in.

Exit velocity is a simple task. A piece of wood with lines painted on it with a camera set up at a known distance to catch it flying by. Known line thickness and frames per second. You don't seem to afraid of math. I greatly appreciate your work.

I don't know if this would work for trying to measure velocity and KE after passthrough of a thorax, but maybe put the lab radar on top of the test thorax or maybe 20 or 30 yards past it facing the target. Though the either option run the risk of popping the expensive toy with the arrow.

Another great vid, thanks! Something to chew on: what if you set up that 2nd radar thing up on a ladder stand or another elevated position? Could the cone on the radar capture the velocity exiting the pig thorax? Just a thought.

Lol Troy. Back in 1963 we used Bear arrows on like 45 # recurves. Had no idea of arrow weight etc etc. Just killed deer for years easily. Arrows always blew through them. Of course only maybe 25 yards max on a few. Mostly 20 and closer shots. Probably Easton aluminum shaft as I remember.

Your right, it's a hard job but someone's gotta do it!

I've always therorized that the action of a mechanical head opening is akin to structural failure. Its controlled of course but there must be a significant dump of energy thru the deployment process.

Semantics... the word "stubborn" means to be unreasonably inflexible or unwilling to change one's mind with reason. You are not a stubborn man

I’m not a bow guy I’m a gun guy but in firearms a heavier projectile will always carry and hold the energy better than a lighter projectile. And mechanical broadheads shots never look like they get very much penetration… it all just makes sense

Assuming you're hitting near exact where you're aiming, an old school chronograph at exit might suit your purpose if you are testing for velocity after initial impact

You can try to use 2 capturing machines. One in the front before entry and one behind in the same plane when it leaves the animal.

No matter how many animals anyone has shot or how many arrows they can stack into 1inch at 100m - the physics, maths and Newton don't lie. As the arrow sheds speed (velocity) the KE drops rapidly as it has velocity squared in the KE equation. Arrows don't shed weight no matter the distance. The sooner the industry stops arguing over nonsense (unscientific opinions) the better. Lighter arrows shed speed faster and hence lose KE and momentum faster than heavier arrows - simple science.

Troy, valuable info as always. A few things: 1. Would it be possible to shoot ALL the various weight broadheads using the same arrow shaft? i.e., if it takes a 250 spine to shoot the MAX broadhead/insert, could the same 250 spine be used on the lighter offerings to take the shaft variable out of the equation? 2. Would it be possible to setup a "controlled" (repeatable) target with something emulating meat/a simulated bone (1/4 or 3/8 plywood perhaps) /another meat layer? Pig thoraxes are good in theory, and taste good when grilled after testing, but may lack dead-nuts repeatability. Having spent many years doing "trade studies" to determine the best course of action for a design, I APPLAUD you and the Doctor for your efforts.

Ok there are some good points here about speed/drag, ke at impact vs launch, etc. But mechanicals simply do not take 50 ft/lbs to open. That would mean that for a three blade mech with each blades traveling 1 inch to expand would require 200 lbs of force to open each individual blade. A better way to determine ke diff for mechs vs fixed would be shooting both through a thin material that gets the mech blades to open and recording the changes in velocity for both heads. Then you can calc ke loss for each.

camera with 4k 60 fps behind the animal with a board painted in a 1" grid should give you speed when you count the frames; Like Mythbusters used to do.

love your hard work and its details, looking forward to much more, btw what is the current heaviest mechanical broadhead out there? 125? 150?

If you're willing to trash a chrono, you could set one up on the back side of a thorax to get the exit speed.

ENGINEER HERE: Kinetic energy is totally the wrong thing to measure. It’s only useful when you’re trying to accomplish hydrostatic shock (what happens when a bullet hits a deer) the bullet transfers tons of energy and causes cells to collapse from the shock wave. An arrow does not do damage with a shockwave. It does damage with penetration. What measures penetration is momentum, not kinetic energy. Momentum is mass * velocity. Kinetic energy is (1/2) mass times (velocity^squared).

Troy, just a thought I came up with watching the video. Get several mechanicals and build arrow and bow combinations to for as low as KE as you can and shoot those mechs. Record their results on rather they deploy or not upon hitting a medium. I know you don’t like gel, but we aren’t concerned about overall penetration, we jus need the head to open. Continue to increase KE until you reach a number that the head opens. Gonna go through a lot of rubber o-rings and collars, but that might help determine that minimum threshold to open the head.

To measure your exit velocity, I would suggest filming with high-speed camera with a graph paper as the background. Calculate velocity based on how many film frames it took for the arrow to travel the measured distance. Next comes the target medium. Developing a target that is homogeneous to represent a baseline for all your testing. Good luck.

If you could shoot the poundage to get a 670 grain arrow to leave the bow at 294 FPS, as shown on your chart, then that would be a super arrow with only 14% erosion at 60 yards.

I shoot 75lb ever since the Mathews switch weight came out 29.5 inch draw and right around 500 grain arrows. Spend a lot of money on my arrows and shoot one deer get crappy penetration with a mechanical and the deer runs off with a 50$ setup arrow in it and break it every time. That’s when I threw the mechanicals in the trash and went to iron will double bevels and have since switched to the iron will single bevels and I haven’t had an arrow not hit the dirt on the off side since the switch. 75lb 29.5 DL and 288 fps that’s a lot of KE and still couldn’t push a mechanical through a thin skinned deer 95% of the time!!

👍👍

Fyi I live in New Braunfels and would love to do some testing with you on potential damage with the sevr broad head on the end of a heavy arrow with a solo cam bow. Let me know.

There is one way you could measure the kinetic energy lost by mechanical broadheads deploying, but it wouldn't really use the Labradar. You'd need to set up a camera perpendicular to the target, pointed at a board with calibrated marks. Then you could set up a target (off the top of my head sheets of foam would be easiest to tinker with) that gave just enough resistance to deploy the broadheads, and measure the speed before and after impact. It would require doing the math by hand, but it would also result in some pretty kickass slow-mo footage, so ¯\_(ツ)_/¯

Of course, you have to have said mech head pass thru said deer. I suppose the ones that are below 1.5" dia might do good in plan A shots.

Can the mechanical head survive the kinetic energy required to open it when encountering bone?

@ranch fairy the Sirius calculator keeps crashing for me. I have 70 lbs 324 ibo and 30.5” draw. I am looking to go 300 grain up front. Should I do a 200/250 test kit or 250/300?

I'm a western hunter who's a little bit tough.. I don't ever shoot sixty yards. I have shot one bull at fifty ish. But most of my shots on elk are under 25.

Try some sevr 1.5 on some pigs. They are a great off switch.

DUH!

Loved the video and it got me thinking, that's a bad thing most time. Is there a data set for low poundage shooters, like in the 40 to 45lbs range? what is a good setup for lethality for these individuals at 20 to 30 yards, and yes, I'm looking for a setup for the wife and kids. What I thought when I was buying mech broadheads for a low poundage pull with light weight arrows was keeping the velocity up, but your video destroyed my thought process, and I am second guessing her mech broadheads.

Is there a way to take published KE numbers from the manufacturer and use a scale pushing through a consistent medium of some kind to see if you can match up KE with recommended minimums?

What is the fps/weight ratio? Is it 1.5 fps for every 5 grains? I’ve heard different numbers.

I´d have a question. im aiming at about 500-550 grain. is it better to get a "light" arrow with heavy tip to achiev this or a "heavy" arrow with lithgter tip? bc of FOC. or doesnt it matter, if you achieve the total weight? Greetings thanks for the vid

Newton and Murphy are always messing with me.

Could you elaborate on what you meant with your discussion of Newton's Third Law? I'm a physicist and I couldn't follow your reasoning on that point. BTW, you could measure the impact and the exit speed very precisely with a high-speed camera.

Haha...."the tattood western guys"...spot on!

Rocket man is going to make an engineer out of you yet, Ranch Fairy.

My 650gr 20% FOC meat missiles tipped with Sevr 1.5’s and Grim Reapers have taken many deer off the face of this Earth expeditiously.

Troy build an arrow guillotine. You can measure the actual weight it take to push a broadhead through an animal.

The negative comments come down to 3 things. Moment of impact, edge retention & the beloved arrow flight after clicking a button on a range finder. Not to mention wound channel & how much energy it takes to get through the opposite end of an animal after losing all that energy upon impact. Someday there is going to be a class action lawsuit & the mechanical setup will be to blame for people who don't tune or care about anything. Meanwhile the Rest of Us group will have our lifestyle significantly altered by people who simply didn't do the math or the homework to get results they thought they were getting by just screwing on a head that mimics their field point 🤔.

Hey RF. do think you could get Sirius archery to make heavy, beefy insert for . 166 arrows... I've looked everywhere and there isn't anything above 75gr. And for someone shooting Magnus black hornet it's tricky to get enough weight with strong inserts. (Most "heavy" insert don't have the option of insert weights) so I'm stuck with aluminum inserts 😩

This is probably the wrong video to post on but it's the latest and hopefully someone can help me out. I live in New Zealand and have been watching for quite a few years and switched to single bevel because of this channel. I haven't seen anything touched on this yet well at least what I remember and what I can find, natural arrow rotation and natural single bevel rotation. I have only just learned about left and right bevel broadheads. I have always had issues with arrow flight when shooting a single bevel and one day I remember that single bevels have a natural rotation and so does the arrow, so could the fact I live in the southern hemisphere and shooting straight vane with a right bevel broadhead be the cause of my flight issues?

Question- what would a mechanical do say like a sevr 1.5 cut, in the end of a 550-650 grain arrow?

Spoiler Alert 🚨: No mech broadhead companies have called Troy. 😂😂

Great info as always, RF Anyone who hasn't read Dr Ashby's paper "Momentum, Kinetic Energy, and Arrow Penetration (And What They Mean for the Bowhunter)" should definitely do so to help understand what Troy is talking about here (and in the momentum video). Dr. Ashby's paper can be found here: cpw.state.co.us/Documents/Hunting/EHU/Momentum-KineticEnergy-ArrowPenetration.pdf I believe that one of the most important and least understood aspects of arrow performance is the question of "what" is producing the results. That is to say, is it KE that matters most or is it Momentum? It takes energy to deploy mechanicals. That energy comes from KE, by the only part of the equation that is variable at impact is Velocity. Therefore, velocity is reduced and thereby so are both KE and Momentum. However, it is momentum that carries the arrow through the animal and an arrow that gets more of its momentum from mass (Momentum = mass x velocity) will have its momentum reduced LESS by the work required to deploy the blades than will an arrow for which the momentum is dependent more heavily on velocity. The same is true of a fixed, cut-on-contact broadhead that has to smash through bone. The energy to break the bone comes from KE but the ability of the arrow to continue on is dictated by momentum... which is less effected by the velocity change if the primary source of that momentum is mass instead of velocity.

This all is very interesting and I'm seeing how it makes sense, however, the part where your said to move your pins to address a slower/heavier arrow.... Thats nonsensical - I'm not sure I want to guess weather an animal is going to duck or not, or spin or jump or w/e a wild animal feels like doing- im stuck in the 550g area which seems balanced too me. But I love the content, I think change continues to happen due to people that love the sport, thanks for putting the time in.

I am curious how much energy is actually lost for these mechanicals opening. It may very well be that they need 50lbs to open, but that doesn't mean that they slow the arrow down by enough to drop the ke by 50 lbs does it?

A lot of the KE is to deploy them. I will never ever understand a light arrow using a mechanical i just cant get it.

do you know when your broad heads will be back in stock?

What do you think of 'The Tooth of the Arrow' broadhead?

What kills me about people that shoots them light arrows with mechanicals is the same people if you tell them you're hunting with a .223 they will say man you need to shoot a 6.5 Creedmoor get heavier bullets

You can lead a horse to water, but you can’t makeM drink!!!! The bottom line is there are going to be those that don’t,or want put in the effort or time to tune there fixed blades. There gonna dance all around what they know they should do… And in my opinion it’s not so much about the mechanical working in the “double lung” scenario, as much as it is about the “What ifs”, and the shoulder hits, or the “I don’t know how that happened” kinda shots… That’s when the Two blade high FOC setups shine. So my question is, why play Russian roulette with the shots you take on your animals?

Am I a scientist? No. I shot heavy arrows for two years with single bevel broadheads. And this year I just tried mechanicals again at 450 grain arrow weight. I'm 100 percent on pass through with both setups. But the mechanicals provided far more blood trail I'm sticking with mechanicals until something happens to make me switch. (For whitetails anyways)

Like I keep telling people 60 lb draw bows or less have no ethical reason to be shooting mechanicals. I kept a couple deer shoulders to prove to people lighter draw bows and mechanical like me don’t play well with others

THORN RIFT 2.2 BROADHEADS 125GR ARE THE ONLY MECHANICAL THAT ANY ARCHERY HUNTER SHOULD SHOOT , THE THORN CROWN FIXED IS THE ONLY FIXED BROADHEADS ANY ARCHER SHOULD SHOOT... THORN BROADHEADS ARE THE MOST ACCURATE, LETHAL CONSISTENT BROADHEADS ON THE MARKET & THEY NEVER LET U DOWN ...

Shooting too light of an arrow is a big problem , I’ve shot 100s of animals with mechs and I always passed threw my animals you need weight

Not to be a smartass here, but you've got more than one of them radar units. Couldn't you set up a pig thorax at 25 yards, with a radar unit next to it, and gather the data after the arrow exits the test subject with the second radar unit? By the way, these videos are completely enthralling to me. I'm not particularly a numbers guy so to say, but I do try my best to ethically kill animals and made the switch before this bow season. You have a believer here.

Seriously and fact, I have never used a mechanical on deer antelope etc and I have never lost an animal. Yes, I’ve had some bad hits and it took effort to find some of these animals. I did hit a coyote at 55 yards with a two blade mechanical once and it didn’t even come out the far side. On a coyote, really? Someone gave me it and I carried it for squirrel or coons coming to my feeder.

But I blow thru elk at 500yrds with my 500 spine twizzlers!!! Your wrong I’m right. I prefer Allen brand broad heads 🤣🤦‍♂️. Yet another great video. Keep it up.

I have used mechanicals for years ,no issues with penetration ,I personally choose not to overthink this and keep it simple .

There's no doubt fixed blades penetrate better. But I'd rather know exactly where my arrow is going!!!!!

Biggest thing I hunt is whitetail and I've never had a issue with my mechanicals. I shoot a medium heavy arrow at 390fps out of my crossbow so I'm not changing to fixed. If I was hunting elk/pigs I would switch to fixed.

You should come out west and see how close you can get when you're not sitting on a bait pile 😘

hi mate im tomi from finland what i think overall bowhunting is not same like it usesed to be at 90- today its like diverent fucking kults and my mind gets f... up . i like your stuff and hate cam hanes he shout be in womens sport illustreded whit stings and bra on whit joe rogan i know that everyone has to have butter over bread.but some times all the shit gets over my head i dont mean you man but i miss the old skoll .keep up you and your buddies.tommy

Some good content but his analysis of "available KE" is wrong. While he admits that he is not sure what the expandable mfgs mean when they list their recommended effective KE's, the Fairy is wrong when he says the Available KE = Impact KE - Avg Mechanical KE. ie: 57 impact - 50 mech = 7 ft-lb to do "extra stuff". This assumes it takes 50ft-lb at impact just to start penetration and open the expandable leaving 7 ft-lb to additional penetration. Since he professes common sense, he should know this makes no sense as expandables generally open VERY easy, easy enough that merely opening is a non KE factor. I believe the mfg KE recommendations relate to the broadhead performance in it's entirety....meaning the design of the open head, it’s size, blade angle and materials. Therefore almost ALL of the impact KE is available for "extra stuff". Before you all start flinging around ADULT arrows watch/listen to the Nock-On and Podium archery episodes with Troy. He is on his back foot much of the time. Dudley and MFJJ are also very respectful and patient. Troy could take a lesson from them as his condescending sarcastic attitude gets very tiring.

Been snorting the dust for 3 years now

Great work Troy and rocket man, many thanks. A few thoughts and requests... 1. Could you have your meter elevated over the target to get the KE at target and once through it? If your target media was clear would the meter register through it? 6 inches of ballistics jell for example? 2. Could you please test arrow volume at given velocities? I suspect arrow volume increases proportionally with drag thanks to Newton. This if correct would mean sound is travelling to a target faster with a faster arrow. I assume then there is some sort of paradox for optimal speed versus volume level in terms of minimizing the "jumping of the string" issue we all face. 3. Lastly, there are sharpness meters. These quantifying devices have a thin thread that will get cut by the object being tested and a metric is then provided allowing for comparison of sharpness. Presumably that device would also work to dest deployment thereby giving you a value for the necessary force required to deploy a given mechanical broadhead. www.sharpeningsupplies.com/Edge-On-Up-Professional-Edge-Tester-P1563.aspx. The same device can be used to measure fixed head sharpness.