7.62x39 only because I still have on hand quite a few factory rounds from years ago.... And I rarely shoot the rifle anyway. So I might be dead and gone before I run out. Otherwise I'd reload for it. All my other rifle rounds I reload (.30-30 and '06) .... But again I have to blow the dust off the dies when I do.
All my revolvers (besides .22) have not ever seen a factory round that I can recall anyway. The rifles have the first time, just to get the brass.
A clinger. When guns are outlawed, only outlaws will have guns. Single Action .45 Colt (Sometimes improperly referred to by its alias as the .45 'Long' Colt or .45LC). Don't leave home without it. Ok.... the .44Spec is growing on me ... but the .45 Colt is still king.