Firearm : North American Arms .22 Magnum revolver with 1 1/8" barrel Ammunition : Various .22 Magnum Calibration : all depths corrected depths Shots were fired at 10" distance from the block - as such, impact velocities were not recorded. Shot 1 - CCI Maxi-Mag HP +V 30gr, penetrated to 11.4". No expansion/deformation present. Shot 2 - Winchester 40gr Semi-jacketed hollowpoint (part #X22MH), penetrated to 10.6". No expansion present. Shot 3 - Winchester Supreme 34gr JHP (part #S22WM), penetrated to 11.0". Minimal expansion of copper jacket took place, no deformation of the lead inner core. Shot 4 - Remington 40gr JHP (part # R22M1), penetrated to 9.0". No expansion present. Shot 5 - CCI 40gr TMJ (FMJ bullet), thru penetrated the 16.0" block and was not recovered - estimated penetration depth was 12.5" plus some.