It's interesting. I used to be one of those bigger bullet is best bullet. So I carried a 45. And it was a 1911 because well... that's what my father had and it seemed good enough for me.
And when it came time for a bug (backup gun) I went "well I gotta have another 45". But I needed a jogging gun. And that was a pocket 380 acp.
So that was two calibers for carry.
But then I decided... wait why have 8 rounds when I can have more.
And went to.... a 9mm (It was still a 1911 but doublestack!)
So... for those of you keeping score I was up to three calibers for a defensive use to keep track of.
But... then I started looking at pocket nines. Turns out a good one will be almost as small as a pocket 380. But will have real sights, be 9mm and have more pleasant recoil.
Well... at least the Sig 938 does. Which nicely replaced my pocket 45 and pocket 380.
Especially since for jogging I got a proper kydex holster for the Sig.
But yes... that brought me from 3 calibers down to 1.
And.... both were 9mm 1911's.
I don't exactly... recommend this journey on carry guns. But it was interesting.