You ain't gonna like the answer....
Because its out of production, and is too big for CCW or even a duty holster gun.
LAR GRIZZLY
Conversion kit to .45ACP. Any gun built to handle the .45 Win Mag will take a steady diet of .45ACP +P without even noticing.
Second answer, still in production, but not an automatic, the Ruger Blackhawk .45 convertible using the .45ACP cylinder.
I don't know of any maker who will state their .45 auto will take a steady diet of +P ammo. Some of the guns will take it better than others, but no maker will come out and state that.
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All else being equal (and it almost never is) bigger bullets tend to work better.
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