Sssooo... my .50 Beowulf plans have fetched up against the price of .501" barrels. Perhaps it seems silly in view of the overall cost of the project, but it chaps me to find prices for .501" barrels close to $300 for a blank, and .510-.513" barrels as low as $75.
Doing some more research, I found the .50-110 has the same case head size as the .45-70, .040 more than the 54R. Overall length is 2.75, vs 3.038" for the 7.62x54R. Bullet diameter is .512, so an inexpensive barrel could be used.
When I saw the .50-110 posts I thought the guy was nuts, but it looks like it would be no more difficult than .45-70. .50-110 chamber reamers can be rented without trouble, and though the brass isn't as cheap as Beowulf, but at $1.18 each qty 100, the price isn't too bad.
A .50-110 would be *much* simpler and cheaper than a .50 Beowulf.