Howdy all. Just wondering if anyone has much experience with IMR 7828 in the .7mm Rem mag? I have worked up a load of 69.3 grains behind the 140 gr Sierra GameKing BTSP, that is printing 1/2 MOA @100 yds. According to my chrony it clocks an average 3050 fps, from a 24 inch barrel, and I just...