I'm planning to use an M305 receiver to build an accurized DM style rifle using a krieger medium contour barrel and Sage EBR stock. I'm wondering if I actually need to replace the Norinco bolt? I know most people have done it in the past with TRW bolts or other USGI bolts but I've read that if you are replacing the barrel and having a gunsmith fit everything that replacing the bolt isn't necessary. Do I actually need to replace the norinco bolt? My goal is a 3/4 MOA rifle (consistantly).