My wife and I carry 9mm....I can afford to practice with it which means I will shoot better under pressure. Bottom line is that a .45 will knock a guy off his feet, but if I can't afford to practice with it I won't be as accurate as I need to be. Also the modern hot rounds of 9mm have much more stopping power.
Not being argumentative but if a .45 round knocked people off their feet, the laws of physics would say that it would also knock the shooter off his feet... I'm sure you meant that as a figure of speech.
The old adage of,"Carry the largest caliber that you will carry & that you shoot well." definitely applies here.
After the FBI shootout in Miami back in the 80's, the ammo mfrs. at the insistence of several Fed. agencies w/ the FBI leading the way set out to increase the lethality of the duty rounds available.
Since that time their have been huge advancements in terminal performance in pretty much all of the most often carried calibers.
Whatever caliber that you prefer, I would just make sure to carry a quality round with a proven street record in actual shootings so as to do away with a carry choice based purely on speculation..
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