Owning an 455 and a 457MTR, the only thing I really like about the MTR is the stock. I'm a sucker for that style. The barrel doesn't shoot any better than my 455 ~16" Varmint factory barrel. The tight chamber is incredibly tight, and after a couple hundred rounds of CCI Standard Velocity, I'm really having to cam that bolt into battery. It really puts the bullet into the lands upon chambering as well as a healthy ring of wax/lube at the front of the chamber.