No, it's still a 45 Colt.

I have a load with some Surplus Unique, 9.2gr, with a 454640 255gr HP boolit it that I cast here at home, that develops 1050fps out of a 5 1/2" Ruger Blackhawk 45 convertible.

Accurate enough to put them all in a pocket notebook size piece of paper @ 25 yards.

Check out the pictures in the "What did you load today" thread.

They are super cool looking and very accurate!