Sounds a wee bit hot to me. I'm told that the military load is 6 grains of Unique. I used to use 7.5 grains of Unique and really shortened the life of the recoil springs of my 1911. The brass would eject straight up instead of out to the side with that load.
Ayuh. Bearing in mind that most of the "1911s" in stores now are cheesy chinese cast receivers and slides... that load should probably require registration as a Destructive Device.
d.o.l.
Criminal Number 18F