[liontech]

Anyone use the same powder for reloading your .45acp, 10mm, and 9mm?

[Kamicosmos]

Power Pistol would be a good bet. Also try Blue Dot.

[Mike Irwin]

I've used WW 231 for all three, although 231 doesn't give you the high-end loads in 10mm.

[HSMITH]

If you don't mind a lot of bright muzzle flash Power Pistol is a great choice.

If you don't like flash and don't need top end in the 10mm Universal is a good choice.

If you need top end loads for all 3 Longshot is one of the best.

800X will do what you ask if you don't mind horrific metering.

Blue Dot will do it reasonably well, as would Unique.

231 is a good choice for the lower end of things, and Super Field is a a good choice if you need warm loads and prefer Winchester powders.

There is probably a dozen or more powders that will do what you ask. What you need to think about are the drawbacks of each powder in each caliber and weigh that against the strong points. No one powder is "just right" for all 3. Power Pistol is the closest to being right for all three in my experience.

Why pigeon hole yourself into just one powder though? I have a can of each I listed and a half dozen more, and I use them ALL. Use the best powder for each load you build, it works better than any compromise.

[Mike Irwin]

231 is better than for the lower end of things.

It will take you to roughly the middle of the pack with any of the logical bullet weights in 231.

It will go to the top of the spectrum in .45 ACP, and very close to the top in 9mm.