I guess if you're using a 280, the 308 should be fine. However the 280 would probably be better for pronghorn. The 308 seems light for bear and I'd think elk
When you look at .280AI, the closest comparison is the 7mmRemMag. I’m running the same bullet as the 7mmRemMag, at about 100fps slower. Elk can’t tell the difference in 100fps.
I killed 2 elk at approximately 480 yards with the .280AI. Didn’t recover either bullet. One was a head shot, though.

