Do you own a gun that could knock a guy off his feet with one shot if you hit him in a none deadly spot like his shoulder?
Many if not most police forces have gone over to issuing .45 ACP to uniformed cops for that reason. It's the quintessential "big slow round"--maximum knockdown power in short-range exchanges. Most law enforcement will tell you that most good guy/bad guy exchanges happen at seven yards or less, which is why a lot of gun ranges have a lane marker at seven yards.
