Just posted this over at 6mmbr, but for those that don't frequent that site, here are my findings. Today I weight sorted some .284 Winchester brass. Needless to say I got a shocking result. I know there has been some discussion as to what brass guys are using in .284 Winchesters; either "straight" .284Win Win brand or necked-up 6.5x284 Lapua (oh the irony). I've read that Jerry Tierney extensively tested both Win and Lapua brass and found "Win brass shot as accurately as the Lapua brass". I know that the Win stuff will need to be annealed though. Anyway, here is the breakdown. Started with 200 brass. Two bags of 50 with the same lot#, and 2 other bags of 50 with the same lot# but different from the first. I guess that was a complicated way of saying two groups of 100 with different lot#'s. All brass was fully prepped. Flash holes deburred, primer pockets uniformed, full length sized, trimmed, necks turned, necks deburred, and inside of necks polished. 12 brass were immediately culled for random things like crimps and off center flash holes. 188 brass were weight sorted into groups with one grain increments. For example, group "205" weighed anywhere from 205.0gn to 205.9gn. 201gn - 2 202gn - 8 203gn - 21 204gn - 52 205gn - 54 206gn - 23 207gn - 14 208gn - 10 209gn - 4 56.3% of the brass were within 2gn!!!! Just wanted to pass on my results. I thought someone would find this interesting. Anybody have anything to add? Anybody find similar results? Anybody using annealed Win brass? How do Lapua compare to Win in terms of weight uniformity?