Years back I used 57.5 of IMR 4831 with 130's for 3100+. That powder usually won the velocity contest with all the 130's but I had some concerns about using it in hot weather so went to H4831 and now to H4831sce.

I have gotten great velocities with 150's using IMR7828ssc but with charges less than those used by Cactus Jack.


“Perfection is achieved not when there is nothing more to add, but when there is nothing left to take away”.
Antoine de Saint-Exupery. Posted by Brad.