My CPA 45/70 won't shoot slicks so I've been shooting GG. Must admit I'm not a fan. So I'm looking for information on 2 deminsional paper patch bullets. My bore is a .4566 and .448 PP bullet is snug . I'm not sure of the free bore yet but I assume it's CPA standard chamber. Would my mix be for a GG 20/1 or PP 16/1. Any information would be great.