I have to agree LD50, I watched a video online where a guy used a small .22lr pistol and put 4 rounds thru a 2x4 at 13 feet. Now that should be enough to stop someone, and you can put 2 or 3 rounds in them very fast. I also believe the .32 acp is over-looked too much. This country should grab on to the .32 acp as a carry gun. Loaded with fmj a .32 acp will go thru 4 layers of denim and get 14 inches penetration in gel, saw it online in a video. People that want an excellent gun with little recoil really need to get a .32 acp.
Have never fired a .32 acp round but don't doubt it could do the job needed. The advocates for large caliber being the only choice are overlooking many effective choices. Being able to put multiple rounds on target is what is important.....if a person can do that with a .454 or a .22LR and stop the bad guy, then that's what matters... just my opinion!