I like my 30-06 A.I. and now my 30/30 A.I. in rifle calibers. Then for handguns is 9mm and .44 mag. If I ever get another .45 Cal something I'm all set for it, whether .45 Colt or .45 acp.
Shooting "mouse fart" loads to fire form brass from the 30-06 A.I. is a hoot! People are sitting and watching and waiting for a huge BOOM and are very surprised. I probably have another 100 or so rounds to fire form and I'll be through.
The 30/30 a.i. is different. All of my loads are from when I lived in Eufaula and let my son shoot it until he got his own rifle, and my rifle had a standard chamber at the time. I also always had a box or two loaded up for my late hunting and fishing buddy, just because.