.30 for me. I'm a cast bullet shooter and the selection of molds in that caliber far outweighs all the others. .22 is a close runner-up as favorite. Come to think of it, with 30-40 guns at hand, there are is only one between .22 and .30- a .25-35 Savage barrel for on my swap-barrel 1899 custom takedown, and that barrel gets cast bullets only also.
