I have the B Mag and was having some accuracy issues @ 50 & 100yds. I was getting aggravated and was tinkering with the rifle. I got trigger as low as it would go, I went through the recommended barrel break in procedures as well. Finally, out of curiosity I slid a piece of paper between barrel and stock. It stopped half way through..... I took the barreled action out of the stock and got some 100 grit sandpaper. Wrapped it around a deep well socket and went to town. After about five minutes, and a quick cleaning, I put it all back together. Rifle shot first group 3" low..... I knew immediately that this was going to work. After adjusting scope I shot about 25 more rounds with my best group being right at 3/4 inch @ 100. Prior to this, I was doing good to get 2" @100 and 1" @50. I even missed a squirrel @ 40. I hope this helps all the other BMag owners out there. It really helped me!