Rifle mostly .308 Winchester anymore
Handgun .30-30
Revolver .357 Magnum, though I might try my .45 colt this year, maybe.
I have used other calibers, but right now these are my favorite. The caliber that I've killed the most deer with, however, is .257 Roberts. Truth be told, it's all I really need even now. It is my most accurate rifle, 3/4 moa gun. Killed my first with that gun 43 years ago.