I would recommend 450 BM too. I have one and the barrel was built by Jim at Apache.
He's one of the best all around! I've got a few rifles barreled with his products and there
all outstanding quality and accuracy.

As for accuracy, I shoot 2 inch groups with red dot off bench at 80-100. With any type of
magnification that group would certainly be smaller.

With that being said off shoulder I can hit 12"x12" steel at distances of 50-180 no problem
with my 450. That cartridge should easily kill at 250yds with right placement. All my shooting
is with factory Hornady or Remington ammo.