260: That's interesting. From the story I read/remember I wasn't aware that any factory maker other than Rem. labeled them 7mm Express. I believe you anyway.
Just out of curiosity, I wonder who else beside Rem & Ruger might have labeled them that way? IIRC Win. didn't chamber any 280s. (At least that was in print)
Also just curious; is yours 7mm EXP REM or 7mm REM EXP ?
JWALL
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VEGETARIAN.........Indian Word For Poor Hunter