Long range shooting is something that I don't get to do often. I did not buy this gun for my collection. In fact, I didn't buy this gun at all. I won it in a raffle. I did buy the scope.
The .280 is based on the .30-06 necked down to accept 7 mm (.284 in) bullets, with the neck moved forward .050 in (1.27mm). The neck was deliberately moved forward to prevent chambering in a .270 Winchester rifle, as firing a .280 round in a .270 rifle could cause the projectile to get stuck in the barrel or rupture the barrel due to excessive pressure.
Use this link for more info and the best price on this scope, it's a SightMark Triple Duty 8.5-25x50 Riflescope.