I had a field grade 454 that I sent back and had the trigger worked, a 10 factory ported barrel installed, and they set the cylinder gap so close you could barely see the gap. Awesome accuracy with factory 300's, 1" groups at 75 yards from a rest. Broke my wrist in 5 places in an accident at work, the wrist works ok, but it wouldn't take the recoil of that 10" ported barrel. Had to let it go to someone who could and would shoot it. I was amazed, that heavier 10" barrel combined with the ported barrel braught the recoil straight back, very little muzzle flip. That was one fine revolver, some of the best fit and function I've seen so far.
Just my .02 cents worth though.
Jim Berry