Dale
The 280, for me, was the proverbial straw. I swore off Handis for a year or two, I now have the 38-55 project rifle I'm working on. Back on topic, the 280 barrel I got was fast, it spit 140gr bullets out the muzze well over 3000fps, usually over 3100, but it shot in patterns and the primer strikes were at the very edge of the primer.
This told me the barrel was so far off center, I doubt it would ever be accurate.
The 280 is a good round though, and is to the 7 mm Rem Mag, like the 30-06 is to the 300 Win Mag. Just a tad less recoil.