In the powder shortage craziness some of the only powder I could find was IMR 4064. Now that was a real popular powder in the 60's but I never had used any of it. I have had great results with pulled 173 gr. USGI pulled match bullets and 38.5 gr. 4064 in M-1A and 7.62 M-1 rifles. Accuracy is on a par with Black Hills match.