So .451 or .452 will work ok?
As previously stated - the 451 jacketed or 452 cast works fine. Some jackets might be 0.4515, which also works great in a 1911.
I have found 0.451" cast will usually lead a 1911 barrel, some barrels more so than others. I've had no leading problems with 0.452 or 0.453 cast bullets and the accuracy seemed the same.
The 1911 45ACP shoots a lot of loads very well, but I have found VV N310 to give me the best groups but we are only talking about 1/4" better at 50 yards, which may or may not be important depending upon your use.