Penetration Test - 9mm vs .40 vs .45acp - TheFireArmGuy
This guide details a firearm penetration test conducted by TheFirearmGuy, comparing 9mm, .40 S&W, and .45 ACP calibers using a 17-board OSB target. The test reveals significant differences in penetration based on caliber and barrel length, with the longer .45 ACP demonstrating superior performance. The expert reviewer methodically analyzes recovered projectiles, offering insights into ballistic performance.













