Green788 - I think I\'m getting closer to catching on to the OCW thing Green, I think I have been way too technical/anal regarding my approach. So here's what I did: Had enough experience with the rifle from doing a ladder test which showed me that all the "books" except Hogdgon's was way off w/4831 and the 243 Win. Selected 3 powder weights 0.2gr between them, towards the high end of the "book". Shot them in the round robin fashion. Studied the results and determined that halfway between the mid and upper powder weight would be best. Chrono velocities showed a good pattern around a certain velocity. The middle powder weight corrected what was wrong withe the lower powder weight's group. The highest velocity with the upper powder weight was definitely a flyer. The lower upper powder weight velocities grouped with the mid powder weight velocities. Thus the final selection of a powder weight half way between the mid and upper test loads. I picked the load mentioned above and fired three shots. Looked good. Seated a the bullets a schosh deeper and tried that. Things looked better, in fact good enough. Then I figured (this is a new concept for this old geezer) that this OCW load should handle reasonable variances in temperature and powder and brass. So I loaded 5 with the new seating depth, OCW powder weight and mixed brass, 3 W-W (lighter) and R-P (heavier). Result was about a 1 inch group at 200 yds. Velocities, as expected, were higher w/R-P brass but those shots did not excessively influence the group size. Is this the right kind of thinkin' or am I like I was in high school when I caught on to alg I half way through alg II then it 'all' came togther..... Neverthless I liked the results. My son-in-law will too. It's his rifle.