Sounds like you're pretty well set with the powder you have. 231 for 9mm, 38 sp, 44 sp. should work great. I use it and love it for all of those. The 2400 will be great for your magnum loads. Never used PB personally, but should work for 45 ACP if you plan to load that cartridge. There is an abundance of good powders out there, but IMO you are in good shape with what you already have.

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