Why do you Limit Yourself?
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1911 guys, there exist conversion kits for .460 Rowland - which, AFAIK, does not reduce capacity. You can shoot a larger bullet faster than .45 ACP.
I expect that most of y'all know these things, and still continue to carry your comparatively 'underpowered' cartridges. A more powerful cartridge doesn't always require a major change in platform.
There are those who are given duty weapons and can't change 'em, who have medical issues and can't have too much recoil, etc. I don't think that applies to all of us here.
Why do you choose to limit yourself, knowing that handguns are underpowered at best?