231 is good for light to moderate loads with primarily lead bullets. I burn a lot of it in my Model 58.
AA 9 and 296 are pretty similar, and will give you the full-bore butt thumping power loads that the .41 Mag. does so well. Lead bullets with these powders really isn't recommended unless they're extremely hard, or have gas checks.
I've found that AA 7 is also an excellent powder for .41 Mag., as well as 10mm. It's only drawback is that it is extremely fine, and can leak through many powder measures.
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