Cayugad

Is your 58-GM barrel 1-70" twist overbore like mine?

I have seated roundballs (.570 with .020 patch), 315 & 460 grain Minies, 380 & 405 grain Buffalo Ballets -- all loose going down the chute. I can use a .005 cotton patch around my minies and ballets -- still loads without grunting. Without any patches, the conicals just slide down... could use a coat hanger to seat them...lol.

Is yours that big or should I mention it to GM by phone? It shoots fine at 50 yards with everything I've tried... haven't ventured out to 75 & 100 yet!