Windsor,
If I may suggest,don't rebuild that iconic piece!!!!!!! It is perfect the way it is.

Reminds me of years ago,guys would "rebuild " their cars with all sorts of stuff. The last item they then put on it was;

A For Sale sign.

That 1911 will work just fine the way JMB designed it. No need for any fancy ammo,just plain old FMJ which has a perfect track record.

Wayne