After trying many of the usual powders for my 30/06 with 150 gr. Speer Mag tips and 180 gr. Hornady sst's, I haven't found a load that I was entirely comfortable with until today. After reading that on occasion, some '06's will shoot well with IMR 3031 I decided to try it and with the 150's it will shoot sub 1"groups consistently. I am a little concerned about temperature sensitivity with 3031 but for now it feels good to find such an accurate combination.