You guy made me curious so I just went out and did a little pellet ballistics testing. I have a Gamo Hornet .177 producing 1200 fps. I used to use it against the squirrels destroying my avocado yield, but went to a Savage Mark II .22 using CCI Quiet-22 LR. The Quiet-22 is sub-sonic at 710 fps, and maybe a little quieter than the Gamo.
I fired a couple of each into a planed 2" Doug-fir board placed at 75'. Amazing that the slower 40gr .22 at 710 fps had significantly more penetration that a .177 7.56gr Gamo Hunter pellet. It just shows the importance of weight when producing kinetic and impact energy.
Measured to the butt of the bullet obviously (see pics)...The 1200 fps pellet penetrate 3/8". The 710fps .22 penetrated 1 5/8", and almost went clean through (of course the wood density is not the same throughout the board, would could affect results).
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Craig T
Volvo V60 - Daily Driver (I love it!)
997 Turbo - FVD Exhaust, GIAC Tune - 542 dyno hp on 93 oct
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