Normally the smaller caliber #1s shoot tighter, or at least can be made to shoot tighter. However, factory #1s have standard factory twist barrels, a 30 cal will be a 1-10, etc. The 06 or 08 base sized cases are usually very good. A sngle shot take some practice for any reasonable follow up shots.

Looking for a good used #1 takes patience, and can be measured in years.

“To expect defeat is nine-tenths of defeat itself. It becomes a self-fulfilling prophecy. It is best to plan for all eventualities then believe in success, and only cross the failure bridge if you come to it."
Francis Marion - The Swamp Fox