I've had good experiences using a Vortex Diamondback 4X12 BDC reticle (minus the eye relief), or if you can find them a Leupold VX 1 4X12 BDC reticle. I'm not much of knob turner but enough time at the range and you can make most long range shots necessary using the reticle. Ultimately comes down to how well the scope can hold a zero IMO and the amount of range time with your rifle. Both scopes have been mounted on my Tikka SL in 30-06.
Quick story on the Diamondback. While deer hunting in Kodiak I accidentally dropped my rifle scope side on some rocks. Didn't have time to re-zero before the hunt, hiked around a while before making a 230yd shot on a blacktail. Flew the rifle back home. Reticle hadn't moved at all and was perfectly accurate. Not bad for a $250 scope. Biggest complaint is the 3" eye relief which is ultimately why I upgraded. On a .30 cal rifle you'll get scoped. Not sure the recoil of the .280 rem. But you might be okay.
Just upgraded to a Tract TORIC UHD 3-15X42 BDC which I'm excited to test
.
