Well, according to the Gospel of Speer Reloading Manual 13, "If you own a good 280, there's little reason to trade it in for any of the 7mm Magnums."
page 237.
I bought my 280 a dozen years ago, and every time I think of a 7RM I go back and read that Speer manual...
Although I own and like both, I have to agree with Speer. If all I had was a .280 and I wanted more horsepower, I'd probably opt for a .300 Magnum of some sort.
Coyote Hunter - NRA Patriot Life, NRA Whittington Center Life, GOA, DAD - and I VOTE!
No, I'm not a Ruger bigot - just an unabashed fan of their revolvers, M77's and #1's.