A while back I was at a gun show and this dude hde several boxes of remington factory .280 Rem. ammo for a decent price. I bought it and when i got home, I looked at the ammo for splits and grins like I always do and half the stuff in the boxes was matked 7MM Exp.
The boxes were old enought that i imagine remington just might have used up some left over brass. Shoots just fine so no biggie.
Paul B.