Yes that's what I meant. They indicated at least some common actions can fire the cartridge safely. I'm just wondering if the chamber pressure is too high for crf actions to safely handle.
The sales people from Sig said in some videos that they have fired in .277 Fury out of Remington 700s and it worked ok.
So far it does not appear that they have tried using controlled round feed bolt heads. I'm just wondering if there would be an issue containing the higher chamber pressures...
The UPR seems over priced given availability of other options like KRG Bravo. It seems that's more of a competitor to things like the McMillan adjustable game warden.
Another problem with the UPR is, how would one fit a thicker contour barrel down the line or a barrel nut for a pre-fit?
I think they said the extension was a different material and the lugs were a bit larger.
They also might have said that it runs ok on some Remington 700s. Didn't say anything about crf bolt heads though.
It does sound like though, that the unusual materials for durability are confined to the barrel extension, so after market makers should be able to manufacture barrels for these, stainless or carbon, once the specs are released.
There are these:
https://www.cheaperthandirt.com/proof-research-elevation-lightweight-hunter-6.5-creedmoor-bolt-action-rifle-24-proof-carbon-fiber-wrapped-match-grade-barrel-carbon-fiber-stock-onyx/FC-843068113486.html...