222, 223, and 22-250 usually aint very fussy with 55's. Something aint quite right and I would suggest its the rifle. 2208 is listed on the ADI website as a suitable powder but 2206H, 4895, or Win748 seem to be the go to powders for most 223 reloading.
Is it the X Bolt with the 1-12 twist, or the 1-8 twist?
Bookmarks