I KNOW the stainless 455s need some "shooting in" to do their best, I have two of them, and both exhibited the "slow to shoot really well" syndrome, it's taken a BUNCH of HS ammo to get them "shooting right". I knew that going in, though. I also have four other 455s that have been Johnny-on-the-spot for shooting pretty well. The WMRs are also a bit slow off the line, but come around after a couple hundred rounds. That's part of the fun of it, though, and .22s are flat-out fun to shoot.
