IMR 4831 has been my best load. I was just looking at my chronograph book and I see that I started with 44.5 grains of this powder with the Hornady 140 grain SP. I worked up to 47.0 grains which I have written down was to hot for that gun with velocities near 2900 fps. 46 grains averages 2762, the most accurate was 45 grains. No pressure signs and sub one inch group which I also have written that this was with a poor rest. For some reason I don't have my COL listed which I usually do. I shoot almost nothing but the Hornady 140 grain bullet.