Honestly, I was just curious to see what folks carry. As I expected there are many preferences. Shootall might be correct as some others on this thread.
I've seen folks shot with just about every caliber handgun, a few rifle rounds and a shotgun or two. The shotgun was the only consistant 1 shot stopped with a center mass hit, even with dove loads. The worst I've seen (caliber wise) was 9mm with any bullet configuration. Didn't seem to stop anyone well.
Right now, I have ball ammo in the RIA still. It shoots it well. Thanks for all the great responses guys. God bless'