Special thanks to Potomac Ltd. for sponsoring this test in full. === Firearm : Taurus .22 Magnum revolver with 2.0" barrel length Cartridge : .22 Magnum Winchester 40gr FMJ Block calibration : 7.1cm @ 570 ft/sec and 37.9 degrees Fahrenheit Single shot fired into a bare gelatin block from 10 feet distance. Bullet impacted at 1123 ft/sec and penetrated a total distance of 14.5". Significant yawing took place at 2.9" depth and this continued until the bullet righted itself at 10.0", traveling base-forward until the end of the penetration track. Bullet was recovered at 0.222" average diameter, 0.471" length and 40.5gr weight.