Which Caliber Would You Keep?

[J.P.]

So in a SHTF scenario you are going to have time to break down the gun, change the barrel, and the make sure you have the right mag with the right ammo in it? Give me a break.

Well, it's still a viable option and I don't think you'd likely encounter such a protracted SHTF situation that you'd never have enough lull in the action to swap calibers.
If so, you prolly outta' just skip the pistol & go to the .223 carbine.


Oh...I'd keep the 9mm if I had to choose one.