In the past I have used Scirocco's in my .338 and .300 RUM and havn't had any pressure problems and both loads are a little warmer than average but no problems at all. I will keep that in mind though while working up loads for my .264. As for powders my personal favorites right now are RL22 and IMR 7828 and I am leaning towards RL22 that's what has worked best in the only 2 other .264's I know of in use. I also have plenty of RL 25, H4350 and H4831sc on hand because I use these the most in my RUM's.
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hit em' hard and hit'em fast
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