Marine Cpl
.577 Tyrannosaur.
The recoil will be greater and the penetration numbers will be similar if using a hollow point compared to the .40.Depending on my employment situation next year I will be looking to get one of these. 1911 TRP™ 10mm - Springfield Armory Probably in the 6 inch version.
If using hard cast that doesn't expand, now you are cooking with gas.