Worst Caliber for Self-Defense?
The Yankee Marshal, an established firearms commentator, argues that while .45 ACP remains a viable self-defense round, it is no longer the optimal choice due to advancements in modern ammunition technology. He highlights that smaller calibers like 9mm now offer superior performance in penetration and expansion, with fewer drawbacks in terms of firearm size and magazine capacity. This analysis is based on ballistic performance, historical context, and practical barrier testing.













