I'm a firm believer in Accurate 4100. I use it in 357, 44 Mag, and 500 S&W Mag. It performs great in all of them with superb accuracy. It burns relatively cool compared to other magnum powders with less flash than any I have had experience with and I have not ever needed a magnum primer even when I tried it in 38 Special. I bought a 4 pound jug of it a few months ago.
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