00:00-00:30 - Intro 00:30-01:28 - First Shots 01:28-3:05 - Why We Haven't Shot Magnums Much 3:05-3:50 - Overmatch 3:50-5:30 - Heat Considerations 5:30-6:40 - Hammering 700 6:40-6:58 - Group Size at 700 6:58-9:36 - Vertical Stringing 9:37-12:10 - Horizontal Stringing 12:10-14:02 - More Shots 14:02-16:00 Initial Takeaways on Magnums 16:00 -16:25 - Post Credit Scene

The Magnum Council addressing 30-06: “You can be on the council, but we do not grant you the rank of Magnum” 30-06: “WHAT? This is outrageous. It’s unfair. How can one be on the council and not be a Magnum??”

Whoops, I dropped my MONSTER cartridge that I use for my MAGNUM gun

I'm into the long-range (and longer) here in Europe. I have a few magnums, including the 338LM and 375CT; and I've got quite some time on other ones as well, such as the Barrett and AI .50's and various makes of 408CT, 30 RUM, etc. I regularly shoot out to 1100m (1210 yds) or so, and a few times a year out to 1.6-2.2 kms. Most times I don't take a magnum with me to the 1100m range. I prefer to use a medium calibre for the 700-1000m type ranges: cartridges such as the 6.5 Swede, 6.5 CM, .308W, 6XC, 7.5 Swiss. I have a substantial collection of DMR type rifles that I use to 900-1000m, mostly in .308W, 6.5CM and even 5.56. They are great challenges in the 500-900m range scenarios. It's just a great thrill to hit a target at 900m target 7-8 times (from 10) with a tricked out G3 or at 700m with an SPR12 in 5.56. It's just not sporting with the big stuff. The only REAL downside to the medium calibres is spotting your bullet splash. Although, I will admit that drilling a 1500m target with a cold bore shot from a 408CT really brings a smile to the face.

308 trainer in tandem with a 300 WM/NM is hard to beat and I think one of the few things the military got right. Stock up on 30 cal projectiles than can go either way in a pinch and the only thing that really has to be different is powder. Magnums are the answer when that kinetic energy is needed or when the hit probability has to be maximized.

It's called 300 Win-Chad for a reason 😎

Great one, Gents. Cooper has a chapter in one of his books that details specs of some "modern" hot and magnum cartridges compared to some of the late 19th, early 20th century heavy and magnum cartridges and outlines that there really isn't that much new under the sun.

Hey guys, at the end you said you'd like to take them out farther. I live in SW Oklahoma and my range has a 1 mile course all steel and a 1 1/2 mile course. It's not far from y'all if your interested

13:41 I would like to point out that Henry's muzzle brake turns the page of Josh's notebook.

My TRG-42 in .338LM doesn't string, although I don't really push it with quick shooting, because I want to keep the barrel around. I've had it out to over 2200m although it's really struggling much beyond 1600m. With long-range rifles (we start at 338) we try to limit strings to 5 or max 10 shots to keep barrel life reasonable. Also mirage is a killer. I'd strongly suspect the after-market fluting is causing problems with the TRG--factory fluted barrels are stress relieved after fluting for this very reason. After-market fluting most likely does not do that.

I think the magnums have a place in the longest range shooting at targets. They are also really good for improving first round hits at moderate range. I also think that part of the allure is getting a good hit and good terminal effects on large game animals. I don't know if you have hunted elk for instance but getting a reliable clean effective kill on an elk at extended range (beyond say 400 yards) can really appreciate the additional kinetic energy from a magnum cartridge. I have killed 4 with rifles and all have been relatively close with a 7mm rem mag 3 of the 4 were hit through the heart and of those 3 elk they ran between 30 and 80 yards hit through heart with over 2500 ft lbs of energy. The only one that didn't run an apperciable distance was a quartering hit that broke the off side shoulder which stumbled tripped went down and didn't get back up. A little more background is that an elk can go an awful long ways with a "good" hit. It's not unusual to hear about elk running nearly a 1/4 mile with a hit in the lungs from a full power rifle cartridge. They go down pretty quickly but elk are marathon runners of the animal world and walk/jog at a 6 to 8 minute mile pace and sprint at a 2 or 3 minute mile pace. So a 30 second adrenaline filled sprint can put them hundreds of yards from where you shot them. Throw in a mediocre shot and give that elk a minute of sprint and 4 or 5 minutes of just their normal traveling pace and that elk can cover a mile making recovery a serious challenge. Magnum cartridges can help make a 490 yard from good to excellent and from mediocre to good with the lower wind drift in particular and a flatter trajectory helps too. With that said most people don't shoot a 300 magnum hunting rifle well because of the serious recoil. I honestly think most .300 mag shooters would be better off with a .270 they arent afraid of and most don't shoot well enough to outrange it's terminal performance on elk.

I would love to see you guys test a modern competition "PRS" style rifle on your range. To see how much rifle & gear have evolved during the last 20 years.

Henry your absolutely right on the previous owner fluting the barrel being the highest running contender for the stringing, almost no one who does cheap after market fluting stress relieves the barrels after doing it, similarly to when initially boring and again rifling the barrel, if not stress relieved you will be guaranteed to get heat stringing. AI years ago put out their findings on barrel profiles and fluting barrels and what impacts they found they had on accuracy consistency and trends, they came to the conclusion that unless you are only going to fire 3 rounds and wait until the barrel is room temperature again, that fluting is significantly detrimental to consistency once heated unless significant expense is put into stress relieving the barrel, and they don't find it worthwhile unless the customer specifically asks and pays for it. Its the main reason why AI for years only ever offered their medium bull no taper profile barrels, they heat/cool evenly and consistently better than any other form of profile without weighing 15 tonnes. We really should start developing thermal sleeves/shrouds for ELR rifles akin to what main guns on MBTs have, they drastically improve the thermal profiles of barrels and ensure completely even temperature shifting regardless of time, weather, sun exposure and heat/cool both the top and bottom of the barrel evenly, predictably enough to be able to program for it FCS ballistic computers.

I'm going to be honest, I actually like this shorter more concise format with the occasional pew pew more than the hour long leather chair debrief that I never sit all the way through.

This reminds me of a gun forum i read a decade ago - "if we had stayed with .30-06 instead of changing to .308 maybe we wouldnt have needed 300 win mag to address the deficiencies of .308 as a sniping round!" - some guy

Come up to the 2K range in Cresson (my neck of the woods); stretch your magnums out and really show off your marksmanship skills. Great video. #newslettergang

Love my .300WM! I moved up to it specifically for Montana pronghorn hunting. Definitely need the wind bucking capability.

Warming up your powder is a legitimate thing. In the Field Artillery, we had to account for powder temperature for anything over 70 degrees Fahrenheit when sending rounds down range. Although the difference was minimal (a couple meters per second), even for extremely hot conditions.

Love to see you do some runs with some modern hunting or tactical rifles in some magnum calibers like 7mm mag, 300 wm, 270 wsm ect

I love my Mk-22 MRAD (stamped MRAD on the receiver and my Mk-13 mod 2. I shoot the .300 Win Mag reloads with 220’s primarily, I have 230 gr A-tips for 1 mile+ Great for long range. This is how I enjoy my retirement from the Marine Corps

Nice to see both of you shooting in the video.

As usual,another incredible video from the gentlemen at 9 hole reviews. I also would love to see more videos about the various magnum calibers,& while all my firearms have a special place in my heart,my 300WM is my favorite...I have no particular reason why,it just is. Thank you for making such a quality channel & keep up the good work

Happy New Year boys! Keen to see where you go with the content this year!

You should both hit Texas Plinking up as he has a great ongoing KZfaq challenge series called 1 moa at 1000 yards. It would be great if you could win a coin and stretch the Win Mags out past 800yds.

Good info, thanks 😊

Warm/hot propellant to increase velocity is real. I working for US Army ARDEC in the late 1980s. At shoots at the Aberdeen Proving Grounds, 120mm tank rounds were preheated to get the max velocity possible in the tests. Some applies for rifle propellant. The effect may be smaller but do a comparison test with the same lot of ammo in a cold damp Texas winter vs. a hot humid Texas summer. There will be a velocity difference.

I had my old Savage 110ba sent to Teludyne Tech back in 2019 and it was the best investment I ever made. I have close to 800 rounds through the barrel. I can run 10 rounds through the barrel at 200 yds as fast as possible maintaining a 1" group and still grab the barrel and it's not even hot to the touch. I wish they were still in business not sure what happened to them.

Interesting how hot the rifles are getting after only a couple of sporadic shots. I'd love to see how hot a semi-auto in .300 Win Mag like a Nemo Arms Omen would get on your practical accuracy course.

They mention the difficulty of doing the speedway challenge with a magnum due to heat and now I really want to see the speedway challenge done with a magnum.

You guys need to go to the New Mexico NRA Whittington range. Here in Oklahoma we have Badlands Tactical. I bought a stainless 700 long action, and mated it to a .308 vssf barrel reamed to .300WM. Seems like 74 grains pushed a 168 SMK to 1000 in 19 minutes! You need 2k for WM to be any fun.

Just got me a 300 wm snd im so excited to get back into stretching it out.

Im not a fan of 300 WinMag specifically, but its a good round for the application. It is also a funny way to judge hunters on the east coast. In a location where 30-30 is acceptable 300Win is just brutal.

talking about overmatch, when we have to shoot mentioned calibres mainly on distance up to the maximum of 300m here in germany. there maybe one or at least less then a handfull of ranges with targets beyond that range...

I love my 300wm. After my red Ryder I got for Christmas, my Hawkeye was my 2nd rifle I ever received. Hands down, my favorite I have ever used, that round inside 100 yds is like a 30mm HE on an insurgent ( reference analogy). Easy rifle to learn distance shots very forgiving for me at least.

Would love to see a video showing the temps for a 10 round slow fire group, then graph both the heat up and cool down.

My pops passed down an old m77 300wm. Not a tactical rifle at all, but makes 1000 yards feel easy compared to a fully purpose built 308.

What about a practical accuracy course specifically for magnums. Starting at like 700 or 800 yards?

The look on Henry's face when that gong fell 🤣🤣🤣

Been running into the same issue with my 50 BMG and my buddies 7mm RUM. Just not enough ranges that are long enough to really stretch the legs on the bigger cartridges.

Great bid. Love my Barrett 300 Win Mag. 👍🏻

Chamber throat erosion increases rapidly in shot strings over 3 in a magnum rifle. The heat build up from burning all that powder may cause barrel warping and stringing. I wouldn't shoot shot strings over 3 unless I was in a life or death situation.

learned something new here that never even occurred to me - your videos are the best

Speaking of barrels getting hot: It would be really interesting to see a Vintorez on the course, even more so on the speedway. Ian said it cooks really quickly but noone really tested it.

I love the 300 win mag I also use 200 grain Sierra matchking

Cool new format. Good shooting, absolutely love 6:42 near target footage. Helped put stuff into perspective way better. I wonder, how long does it take to cool off your rifle to consider it Cold bore shot. Is it even cold bore shot if you let your rifle cook on a sun? And if we talking about winter/arctic environment, does it benefit from shooting more so you not cool of your rifle to a cold bore condition? Probably a silly non-shooter questions that are answered already online, but just throwing stuff :)

I miss my TRG in 7mm STW. One, flat shooting, cartridge. 🤠

I have experienced exactly the same, for many years, with PGM rifles in .338 LM. Those have really thin barrels.

Come out west! The North Springs range in Price, Utah is what you're looking for.

"Over match" isnt a thing out here in the west in the mountains. Great video guys.

I'd love to see some testing done on this round cooking phenomenon maybe using a thin film thermocouple on the barrel somewhere near the chamber and a chrono. I'm also really curious if it could be measured / proven on a smaller caliber rifle. Maybe collect the data on "speedway" runs ?

Pure awesomeness

This is gonna be awesome! I'm actually currently looking into getting my first magnum precision rifle and this is an extremely timely video! You guys are awesome 😍

"My hands are full, can You turn my notepad page?" "Sure, let me just get use my TRG 42 muzzle brake..."

The US military is switching to 338 for bolt rifles for long range sniping. The 308 semiautos will be retained for SDM abd spotter use

It will be interesting to see how higher pressure cartridges (based on the 80,000 psi 277 Fury case) compare to traditional magnums. They will be able to reach the same bullet velocities with less propellent (higher efficiency) which should reduce the total amount of heat transferred to the barrel. The big question is damage to the barrel. There are some who think that more rapid burning will actually reduce the damage to the throat (reduced abrasion from less unburnt propellent) while others believe that barrel life will be reduced from the combination of higher pressures and potentially higher temperature at the throat.

Henry trying to break targets 😂

I had a very early TRG-42 in .338 Lapua while I was in the military and had absolutely no heat issue. That was actually a huge difference to the AI .300WinMag that was ultimately chosen (and now is going to be replaced with a new .338).

I’ve got a 300wsm that I like a lot. Loose very little performance with short magnum. The shorter action rifle being a little handier, lighter. It being a hunting rifle though I could imagine the thinner barrel getting extremely hot if a lot of rounds are put thru it. Don’t really want to find out because of the ammo cost lol.

Sub minute of turkey. Nice.

I have the same stringing problem on a steyr scout in 6.5 creedmoor. My rule of thumb is to put my thumb on the barrel. I f i can't comfortably press it against the barrel for 1 second then I know it's about to start stringing the next shot. I can only fire 5 rounds suppressed before getting to this temp

I just got a Remington 700 in a green stock 🤠

You should come out to Wyoming and Idaho there’s a great long range shooting scene out here.

Who can afford to shoot .338L? Also yeah inside 1000m, overmatched magnums make it “to easy” to hone your skills. Yes for legit sniping sure overmatch is great. But for training, .308 and 5.56 are going to teach you more, and more economical to shoot. Save the magnums for long range hunting, sniping and extreme distance shooting.

This makes me wonder about a pressed on, or clam shell bolt on aluminum heat sink to pull and shed heat from the barrel.

It might be interesting to compare the PRC family of cartridges to the magnums since the 7 mm PRC is pretty much equivalent to the 7mm Remington mag without the belt and a faster twist rate for heavier bullets.

Size of the bullet driving band is a extremely overlooked factor in barrel heating. Isn't just the hot gasses heating the barrel. 98% of the hot gas never contacts the steel & the brass case absorbs most of the infrared heat load.

I like the 300PRC

Ive experienced vertical stringing with my rem 700 LR .300 win mag. In order to keep tight groups i couldnt shoot more than one or two rounds every 5-10 minutes.

I would love for you guys to come out here to the high Mojave Desert BLM areas where we have unlimited distances for shooting long range

Thunder Valley in Ohio. 1 mile range. Bring it.

300wm is a great dangerous game round because of that immense amount of terminal ballistics. It hits like a freight train.

i have the sako trg 22 in 308 and 6.5cm and the trg42 in 338 and never seen a stringing issue. also i was in Iraq 3 times and only fired one round out of my m40 But to me except for the part about the weight, a magnum makes sense. i go shooting more than the average person and the frequency of my burning out a barrel is so seldom that the average shooter is probably never going to shoot one out. take 338 lapua for example, the amount of money that I have to spend on brass powder bullets and primers to burn up a barrel costs more than most people spend on a gun. but I am a firm believer in using as much caliber as possible such as 300 or 338 in 308 distances

Got to get that 300 PRC

Oh, whoops! I dropped my monster rifle for my magnum sized caliber. -Frank Reynolds

Go see the boys out at Defender Ranch with Tier 1 Concealed

Ive had horizontal and vertical stringing out of my B14 HMR 300wm. 25 rds at decent cadence. Barely was stupid hot.

Fluting a barrel that doesn't come from the barrel maker fluted, is usually a bad idea. IIRC most barrel makers will finish lap the barrel after its fluted because the process of removing the metal from the outside can actually effect the inside diameter because of built up stress in the steel

hi who do you think makes good/ the best ar style 338?

Is this still in eagle lake?

Everytime I hear the "Green/Green" calls I imagine them saying "Green Beans™"....

I only get 3 rounds through my 7mm mag in Temps above 0°c and probably double below zero.

Neat

Time for a 300 prc video

Go to war with the magnums but train on the standards pressure stuff. Unless someone else is buying the ammo and barrels of course.

im guessing that in the field a large factor is that with magnum rifles youre gonna have to carry around much heavier rounds

Cameo Shooting and Education Complex in Western Colorado. 2200 yards of crystal clear high desert shooting range. If you can handle the altitude...

My 300 win mag is launching 230 grain atips at 2850. Absolute sledge hammer. Wish I would have gone 1 in 8 instead of 1 in 9 so I could shoot the 250. For my normal target rifle I'm shooting the 6gt with 115 rdf.. way less recoil but won't reach what the 300 win will reliably

What about Remington 300 ultra mag,?

Can you do "Intermediate" sniper rifle pros and cons?

Magnum, not to be confused with the Ice Cream, or the TV Show

Can you freefall with it?

What is vertical stringing?

I clicked really fast on this one. 👍

The rifle magnum club is impressive. I will stay in my comfortable "regular" highpower club.

.300 Win. Mag. Is a solid cartridge and hotter than the .30-06 which got multiple military branches considering it as a longer range sniper cartridge. Honestly, I don't expect the .30-06 won't still do capably with a shooter who knows his rifle and load.

I asked Sako if there were any data for how fast you could shoot the TRG 22 in 308 before the barrel took permanent damage. They did not want to answer that. Now a 308 is not magnum, but how fast and how many shots can you shoot on say a TRG 22 before you get vertical or horizontal straining? It would be very interesting to see. And yes please, take a trip east and go shoot the magnums proper. Even better, try to recreate verified long range kills with max like 3 shots using different guns 😍

9:00 Is this where 40k got the idea to throw lasgun magazines into fires?

We use the TRG42 .338 Lapua Magnum in Finnish military. Carrying that fucker for days doing recon 😂

It’s ok to feel your own barrel, but asking your mate to feel it is a bit…. weird. But seriously, great info on pro/cons of Magnums in the military. Do you think the 6.8 Fury as a DMR will suffer the same issues or does the extra pressure not translate into extra heat with that cartridge?

Out west as in west Texas?I have always assumed that Texas had plenty of wide open spaces for long range shooting.