i competed in my first match this weekend with a xr-100 in 22-250 and had a great time. now i'm starting to think about a "real" benchrest rig. my question is, would a 6br norma with say a 10 twist in a 10.5# rifle be a reasonable choice to allow trying different disciplines,short range score, group and longer ranges too)? i would prefer to do my loading at home and not have that to deal with at the match. would replacing the barrel be all thats required to switch to 30br or 6ppc at a later date?