I worked up to a max of 55.9gr/IMR-4007ssc with a 165gr bullet in factory Rem 700 with a 24" barrel 30-06 velocity was 2858fps groups around 1" and I've tried in the 300WSM,6x250,22-250AI and 243AI and I think as time goes on it may be one of the better all around powders. I'm re barreling the 30-06 to a 30-06AI and I'll give 4007 another try, it shoot great in the 300WSM and 243AI and I'm still working up loads for the other calibers. Well good luck