UncleAlvah,
My 457 is capable of better accuracy with SOME ammo (have tried several kinds, both match and hollow-point hunting ammo), and got better as I put more rounds through it. But my scope is a 3-15x Vortex with a side-adjustment for parallax, and as somebody mentioned already parallax adjustment would probably help.
I adjusted the factory trigger (which unlike the triggers on the 455 is indeed adjustable) and got it down to a very crisp 2.0 pounds. Dunno if getting it any lighter would help, especially with a medium-heavy rifle. (Mine is also the varmint model.)
