I am going to be taking a class shooting my LMT MWS with a 16" CL barrel up to 600 yards. I am having trouble finding the FGMM 308M2 load, that is the .308, 175 gr. SMK, for a reasonable price. I am, however, finding some of the 762M2 load which is spec'd as a 7.62 round. That makes me think it...