This is a do-as-I-say and not a do-as-I-do statement. Buy a large bottle of one type of well known, established powder with a lot of load data. A powder suitable for .38 spl and 9mm will be relatively fast, but can load up to .44 mag, but not with blistering speeds. The get a well known good bullet, and work up some good loads. You’ll waste more money buying a bunch of bullets and powders looking for nirvana. Have a bunch of left over bullets and powders is a pain. Plus it takes a LOT of time to load up test loads and shoot them.
So one good powder with one good bullet. Try 3-4 known accuracy loads, and maybe a ladder test, and get shooting. You are unlikely to see any difference between N310 and Clays loaded in .45 Acp with known bullseye accuracy loads. N310 is cleaner, but more expensive. But in shooting, they’ll group a good bullet into 3 inches at 50 yards.
Get shooting and after 5-10 years, you’ll know what you like and what works for you.
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