Is this something new on the way from Marlin?
Edit to delete speculation.
Nomenclature worries me a bit. Will Joe Bambislayer handle the difference between .308 Winchester and .308 Express well?
Will people who bypassed .307 go for .308 Express?
Looks like Hornady and Ruger are really getting close, too.
First the .204, now a proprietary .375.
They also show 9.3 and .450-.400 ammo illustrated with Ruger No 1s, so I figure Ruger must be bringing out guns to give them a market for ammo, there are not enough antiques to warrant Hornady tooling up.