JWP, agree, ballistics alone will never make a round successfully and the package I proposed was in a handy short actioned carbine. Know a fella who put a surplus 7x57 bbl on a Ruger, turned down the steps, chopped at 19 or 20" at spits 140s at 3k, pressure unknown, but in a handy light stock. Works.

No doubt, the 280 is a slower mover, the 7/08 better, both same bore size, yet the 7/08 is in a package that has a niche demand.