Re: New barrel maker with new technology
There would be nothing wrong with EDM for chambering, even with a reamer you have to smooth up the chamber marks, and slightly roughen it. EDM leaves a Kerf behind that needs to be removed. You have to remember that you dont want a polished chamber, this can cause problems. 320-400 grit is about the best. Lots of studies have been done on chamber finish, from just reamer to fine polish. A chamber that has been polished smooth will impart unwanted stress on the locking lugs and the case itself. P.O. Ackley came up with the same conclusions many years ago, the best chamber finish is about 400 grit.
If i can find the artical i will post it.