PMs replied to. This is the third such rifle that I have put together, using identical components. The previous two rifles shot sub-half-MOA out to 300m using handholds with 130-, 140-, and 143-grain projectiles. I have used factory .260 brass, and have used re-sized .308; no appreciable difference in accuracy from one to the other when all other variables were controlled (e.g. COAL, projectile and mass, propellant, and primer).