Bought the 6" 454 Raging Bull in black about 3 years ago just because it looked so mean. A side benefit is that it scares the hell outta shooters at the range, especially indoor. I have fired about 500 or so 454 rounds of Buffalo Bore, Hornady and Magtech and never any problems. Same 500 in 45 "long colt" without any problems.
Only complaint is that the black finish, especially at the ports, is kinda crappy. This is easily solved by having it Duracoated in medium gloss black, at it looked even meaner!
Also, ammo is wayyyy expensive, but thats not a fault of the gun.