Alright, I'm turning to the SH brain trust. Recently acquired an M40A5 built by GAP from the hide in a smooth transaction. I'm wondering what the best factory ammo to run in it is. I don't reload and won't be for some time. It's a 1-12 twist. I'm running outta my supply of 308 win 175 FGMM and haven't seen any stocked for a while. Would the 175 gr 7.62x51 shoot well? I'll only be using the brass once. Range wise, I'll be shooting from 100-1000 yards. Any advice would be appreciative. Thanks.