So the rule of thumb is to use the same ammo law enforcement uses to be in line with what ever the state deems appropriate.
I've see allot of Winchester, Federal brass on the ground when LEO practice but what is being used for 556 and 9mm everyday carry? I'm partial to Hornady Critical Duty, advertising suggests the FBI does too. Which covers all 50 states.
I was shooting some 115 gr. Blazers ball the other day. Hardly any recoil and it was taking some good chunks out of the treated 6x6's I was plinking at. I'd like to either get or set up and reload some 124 or 147gr.
Plus, when you grab a long gun, it'll over-penetrate anyway. A rifle will over-penetrate clean through a human torso and so will 00 Buck. So it's a non-factor as well for a PCC if using ball ammo with a fat meplat like pictured above.