I don't know what the throat was like, Ripp - but likely it had the 1/2" or so of freebore, just to be safe with factory ammo.
It simply was a very "fast" barrel, I guess. I've had a few really 'fast' barrels over the years.
The 26" Jeff Lawrence barrel on my daughter's .260, my old Shilen bl.'d 26" .257 Robert's IMP - my current 26" .375/06IMP and my old Oberndorf 9.3x62 with 22"bl.

I've had slow barrels too, a model 1917 US Mauser '06 that was a poke in .30/06, hitting max. with 2,300fps and 220's, 2550fps with 180's, but quite accurately. It would not make .308 ballistics without complaint, so I re-chambered it to .30/.338 to start, on rebated rims, then decided to go full length with the .300 Win Mag., opened the bolt and was done. I think it was actually a P14 action as the action rails appeared to have the central open-area for the rims. It fed .06's just fine, though and after the re-chamber, fed the magnum rounds without a hitch - no mod needed.

Too - after the re-chamber, it turned into a good, normal/fast 24" barrel, however it did not like 220's or 180's any more. It delighted in driving 165's at over 3,300fps with WW Failsafe's as well as Nos. Partitions and grouping right at the 3/4" mark for 3-shot groups. Best were 165gr. Partitions at 3,265fps iirc, and sub 1/2" most of the time. Young local fellow needed it more than I did so I practically gave it to him, $175.00 seems to me.