I had an article from Handloader I think, the guy had data for 250 grain bullets in a M1911. I would never do it as the recoil would be hard and I don't the slide to peen the frame.
A 250-260 grain bullet will work well in a 45 ACP revolver, but by the time you get up to 45 LC velocities the pressures in that small case are much higher.
Really, the 45 ACP is a short case that was developed to function in a semi auto, the operating envelope is small, it works best with a 230 grain bullet, any heavier and the trade off's are not worth it in my opinion.
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If I'm not shooting, I'm reloading.
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