Anyone shooting .400 Corbon? I have a desire for a 10mm, but the Corbon is pretty close, and should work in my Custom II. I am thinking of fitting a 6" Roto Barrel from Sarco, they are only $56. I have been reading "The Colt 45 Auto" manual, and I am pretty sure I am capable of fitting it. Just wondering if anyone had experience with the round, or even these cheap Sarco/Roto barrels which I believe are made by Armscor.