If you had 1000.00 to by a machine to make chamber reamers what would you buy ? I already have mill, lathe, od grinder, surface grinder. So far I have turned the stock on the lathe, hardened, cut the fluts on the mill with a stone didn't like it. try surface grinder so so . Neither of these cut worth a crap, first one wouldn't even cut 12l14. ended up with a d reamer and a boring bar ,and it was a simple 45-70 reamer . I think sharpening is my problem or relief... Any advise appreciated, comments welcome.