I am sure somebody can beat this one. Here's the best 200 yd group I've fired to date with my custom upper AR in 223. Used Sierra 60 grn HP, 25 grns of Varget, CCI BR-4 primer and Black Hills once fired cases. Bullets seated to 2.270 OAL (maximum for magazine) and about .005 off the rifleing. There's surely a flier, and I don't know if it was the 1st shot, 5th shot, or one in between because I shot all 5 and never saw the flier till I walked down to the target. Still testing, Varget is all I've tried so far. Let's see some more It's really great that we can post photo's directly now. Thanks Len!