Be careful what you do any cutting on,you cant put it back. Since they took the PMs I dont have a way to get a hold of you, it took my kid 3 months to show me how to get around on forum and now I guess Im a write off, they belive everyone has or knows how to use one of these things.I tryed the REALs out of the 48" and at 50yds they are 1/2"wider than the RBs.(60grs 2f),in the 26" 50 cal with scope they stayed inside 4 1/2", remember the bigger the cal the longer bullet you can get away with(and longer barrel) I think youll do ok with a 45cal, I must of got the last 45 32" barrel they had made Monday,sorry.Fred