I don't have enough travel on the cross slide to do an accurate job that way.
I think I might. i have to double check.
another thought is regrind a existing reamer for doing straight holes and adding a pilot. there should be some body making specific throating reamers for .50
If you go back and search the old 50 beowulf threads here I posted a few places who might make a reamer that would work. you might have to change a speck a tousands or two. but thats not a issue. adding or reducing. .0001 at say the rim wont hurt any thing and may get around the propriitary BS. I had quotes for reamers several years ago. from a couple. most custom remaers are under $150 use it then sell it or rent it out to recoup your money. I do know that some guys will make them if you ask pretty pretty please.