Mark,

I believe that they are button barrels, but I don't know for sure.

The lighter F14 contours are only cut 21" long. My 260 barrels are the magnum sporter F34 contour and they are cut 24" long. I have an 21" F14 barrel in 257 Roberts on a Swedish Mauser action and think that it is too light in the muzzle, making it butt-heavy like most 18.5" and 20" Remington 7s.

JEff