Just getting started and dont have reloader yet. I am shooting a 600 yd match this weekend, and will have to do it with factory. I will be shooting the .308 federal GMM 175gr. Does anybody know the MV of this facory load so I can figure my drops and windages ? Also I was playing around on the JBM calculator. The point blank ranges seem pretty optimistic. Does anybody know what they use for that? I have for years thought that PBR was the distance that a round deviates no more than 3" from line of sight. They are showing a PBR for the .308 of 350 yds. Aint no way for a 3" deviation is there?