Using 168 gr or 175gr SMK's the Milspec is not finicky and it should be quite easy to get .25-.5MOA using IMR4895, Varget, or R15 42-44 gr, Lapua brass, Fed210M's. COAL 2.8"
I broke in three over the last 10 years. Shoot 1 and clean for 10 rounds, shoot 5 and clean for 10 rounds, shoot 20 and clean, done. I like BoretechCU+2.