Ok, so I'm kinda new to reloading. I have always believed that lead bullets are dirtier in the sense that they leave more residue(leading) in your barrels rifling. However, IME my lead cast reloads for the colt 45 and ACP all seem to shoot pretty clean. Now, of course I always get some leading in the forcing cone of my SBH Hunter and a touch in the cylinders but in the ACP I see no difference. My theory, when pushed at the right velocity, lead bullets can be as or more accurate than jacketed ones and the lead pushes right out with a brush while copper requires solvent to completely remove. Anyways, just wanted to get some other opinions.