Not the final word on accuracy, but a beginning...
fired a few groups to get seating depth right with a CZ .223 and a heavy-barreled Savage .22-250, both with 1 in 9" barrels. Two five-shot groups from the CZ were 1.4" and .9" using Varget, not my favorite .223 powder. Bullet must be seated quite deeply for this rifle, best OAL is 2.18".
In the .22-250, four 3-shot groups averaged just under 3/4" using IMR4064. OAL of 2.35" is good. I think I can improve on the groups sizes with a little work. Have yet to try this bullet in a Colt AR 1 in 7".
