Bullet fit is key to clean, leading free shooting. As BDS-THR stated, slug the bore of your gun snd use bullets .001" or .002" larger than groove diameter. When shooting/loading a 45 ACP, Brinell hardness shouldn't be much of a concern for you now (I cast my own bullets for several years before I got a hardness tester and everything from range scrap to weel weights shot lead free in my guns if they were correct size). See if you can order the Budget Bullets in .452"...
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