re: Good concealed carry calibers?

9 MM. Springfield Hellcat is a good option.

quote:

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While 9mm would keep me from buying multiple types of ammo from what I already have, a 45 sounds appealing because if God forbid I ever have to use the thing, I'd like to be carrying the biggest punch possible to protect myself

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The difference in "knockdown power" between a 9mm and a 45 is irrelevant. Choose the caliber you can shoot best. I prefer 9 mm because I like having more rounds and all of my pistols (if I actually owned any) use the same rounds.