AR-15 with RRAs coyote 20"BBL upper. Tried two different powders with 55gr Nosler BT . So far Bench mark is the best. BL-C(2) performance was fair. Any one try IMR 4895? Varget? H335. Also fired 65gr Sierra Game kings using Ramshots "TAC" it also produced fair performance.I want a 250 yard coyote load.