Interesting question. I'm a huge 480 fan, in a revolver, but, in an encore, seems like the 454 would be the way to go.
The reason I don't much care for the 454 in a revovler is, you just don't need all the speed for revolver ranges, and the 480 is much more pleasant to shoot.
But, in the encore, topped with a scope, you can take advantage of the 1700-2000 fps muzzle velocity.
Then again, with a 480, you could use Lil gun and sub 400 gr bullets for 1600 fps, or more, and you'd make bigger holes. Then again, might as well go with the 475 Linebaugh, and leave the 454 in the dust
