I shoot a 6x284 My BBL (26"HART 10"twist) has over a 1000 rnds through it and it still shoots under a 1/4 MOA. Untill Re#17 came out H4350 was the stuff. but now Re#17 with 57.5grs pushes a 70gr Nosler BT to 4,000 + 53.5grs pushes a 90 gr Nosler BT 3600+. So thumbs up for the conversion to 6x284.