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Who is Ted?

Yes, but by making it lighter, it will hit the valve lighter and let out less air; thereby, more shots, but less power per shot. so the question should be posed: what hammer weight will give me the most shots per fill, while obtaining the best accuracy and power combination? If you were to decrease the hammer weight to the point only enough air comes out for the pellet to fall out the muzzle, you'd probably get about 1,000 shots per fill.

Cool question! Let me analyze: 0.67g x 15.432358 = 10.34 gr, and 300m / 0.03048 =984.25 fps, so 10.34 x 984.25 x 984.25 / 671 / 671 = 22.25 fpe, and 22.25 x 40 = 890 fpe total from your fill. Now, keep in mind that a heavier pellet will travel slower in the barrel, but will accelerate longer in time, so the kinetic energy will be a slight higher by 1% to 5% if all variables are fairly equal; in other words, do not compare apples to oranges as 4.2 grain alloy to a 5.14 gr BB to a 21 gr lead (Pb) pellet. A straight across-cross multiplication equation to convert m1 v1 to m2 v2, since you did not give the velocity of the "1.05g" which is 16.2gr, so the unknown is v2. m1 = 10.34gr m2 = 16.2gr v1 = 984.25 fps v2 = ???.?? fps Isolate the unknown v2 = sqrt of: {(m1 x v2 x v2) / m2} = v2 = 786.336 fps, and 16.2gr x 786.336 x 786.336 / 671 / 671 = 22.25 fpe, so 22.25 x 20 shots = 445 fpe total. Now for the ugly truth: 445 / 890 = 50% efficient for the 1.05g pellet in your gun, while the 0.67g is 100% efficient with the 0.67g in your gun. Now, the answer to your question as to why you only get a 50% output from the heavier pellet, is in the name of the plumber; in other words, without enough information, I am pissing into the wind and wondering why my feet are wet. What kind of gun, caliber, barrel length, type of pellet, pump/CO2/HPA/break barrel, smooth, rifling dimensions, gas pressure, etc., etc... The more information, the closer the result to the truth. If anyone has a quick and dirty answer to your question then that is exactly what they are. From the Ke and fps I guess you have a HPA gun. What would be nice is if you can include if it is regulated or not and what is the fill pressure you are using; also, if you know the plenum size, reservoir volume, and what appears to cause your 50% loss in total power is, what is the transfer port orifice diameter? It is probably 50% of your caliber in order to get the most shots per fill as opposed to it being the same as the caliber in order to get the most power per shot, but least number of shots per fill. Use the following formula and tweak the variables to get your target power and efficiency numbers. psi x π/4 x cal. x TP x n x Bbl" /12 = theoretical fpe π = 3.141592654... n = efficiency (power out / power in) TP = Transfer Port diameter Bbl" = barrel length in inches 12 = number of inches in a foot psi = 14.504 psi/Bar Enjoy your shooting experience because it is also a journey. The laws of physics are not just really good ideas. Numbers do not lie, but you can lie with numbers.

The short answer is there is likely some factor in your gun that adjusts for an heavier pellet its obviouslt either not a strictly moderated gun meaning like regulated guns it releases only the ammount of air that it is designed to within reason or its designed to sort of adapt to whats happening and use more air for a heavier pellet. The air in the resivoir pushes the valve close, but the air comming out has to expand in order for it to do so. A heavier pellet takes longer for a given air volume to accelerate and this could make the valve slower to close. This would allow more air out. Reducing the number of shots. Like how a two stroke motor benefits from back pressure from a exhaust pipe in ways and to extents that a 4 stroke doesnt. Thats my idea at least. The gun is obviously not releasing the same ammount of air with heavier pellets. Because if it was you would see a similar shot count. A halving of shot count is significant and seems consistent which leads me to believe that something in the rifle is changing either by design or by poor design with a heavier pellet. Ask the maker they will likely be able to tell you exactly whats happening.

It's likely a rotten Oring dissemble and replace it remember to use silicon grease for high pressure air

Open up the transfer port diameter to the caliber diameter and polish any roughness in the gas route, but if you want a quick velocity increase without any modifications, use a lighter projectile. You did not include the mass of the projectile giving you 750 fps.

Good question! Do they even start at that range? . I've heard good reviews of the Gamo Urban...

the air goes the same place just slower bc it's restricted

more shots bc the bell curve flattens within the desired range. Matt's part 2 of the the "ultimate sporter "review covers all of this very very clearly. tutorial and review Playlist. and thanks Matt, I'm hooked and now own the above mentioned( American version)

hi thanks for taken the time to answer watched the vid understand now thanks again

+Justin Simpson no worries, Matt has an excellent knowledge file going I use the heck out of this channel. so much I'm going to try and start one here. Lots of pests here and tons of small game hunting to be had

+Bronson Collierr A lot... But it's worth it;)

1800usd without extra barrels or anything added theres a lot u can add

I cannot match idol status, but I would offer a small contribution: the Daisy Buck. For $17 it's the value of the century. I reach for it more than any of my others.