For PRS style matches, how much does different headstamps of brass effect accuracy. I'l thinking of running a semi-auto and they tend to shred brass or at least beat i t up fairly regularly (I might run an M1-A--which itself is an inaccurate rifle compared to a bolt or AR platform). I was thinking of just buying some bulk brass, loading and go. Because its PRS, 1 MOA accuracy is fine--its hit or miss and I ain't winning anytime soon. What is the effect of having different brass on your accuracy? Anyone have quantifiable results or studies?