The 280 is an outstanding round. I had a Model 700 re-barrel with a match grade stainless 24" # 4, Fluted Pac-Nor, 1-10 twist- 3 years ago...
The Action lug and first inch of barrel shank is glass bedded into a Aluminum action based Bell and Carson Stock...

To date I have fired an estimated 980 rounds...

6 deer 7 hogs- one shot DRT Kills- 87 to 328 yard shot's... Scope is a Luepode 2x12x42 VI ..

The Rifle shoot's sub .5", 5 round groups all day at 150 yards with Sierra's, Nosler's or Hornady's with H4831SC...

I once shot a 35 round string into 1.1 inch at 150 yards- opened vertically a bit, due to a very gusty tail wind...

140's average is 3180 fps
150's average is 2990 fps
160's average is 2905 fps

Could load these hotter- but why?