He has tested several thousand rounds of the usual 9, 40, 45, etc. When he tested the 357 Sig Winchester Ranger and Remington Golden Saber ammo, it did something only the 10mm Silvertip has been able to do. Both of these rounds cracked the top plate that holds the gelatin blocks in place during testing. Itís obvious that these 357 Sig rounds dump more energy into 12 Ė 14 inches of gelatin than most other rounds he has tested.
When he reinforced the top plates, the same two 357 Sig rounds mentioned above then cracked the lower plate. The best 9mm loads, such as the Ranger 127gr +P+ barely created a ripple in the gelatin in comparison.