I'm currently loading IMR4350/41 grains under a Hornady 140 grain BTHP in Hornady brass and BR-2 primers. Velocity is 2655 fps and my last range trip put 15 into 3.77 inches at 425 yards. Temp was 37 degrees, humidity 80% and a 6 mph cross wind. The same load in warmer weather averaged 2688 fps.