enfield
MKno4 should be just right.
I've already built a rifle on this action in 45acp, worked great.
Have a friend who will do the work on the barrel for trade, and as I said I have two barrels to start with.
I plan to continue the barrel threads about one inch, this will give me room to rechamber in 7.62x39. Was going to make a savage style lock ring from part of the receiver stub that is on the second barrel, that will make headspacing easy
Should be able to make the extractor reach the case rim with a little work.
I think the mag adaption will be the most interesting part.
I've looked at both the ruger and the cz bolt gun but they use the 308 barrel
I wanted a .311 barrel for a .311 bullet, and with both these pieces being about $500, I think I can spend the difference on the bolt and small parts.