Anybody can buy things.
Not that I intend to make my own barrels, I'd still need a gun drill. I was just curious how accurate a barrel made with a button is. I'm not trying to be rude, but don't you think I thought of buying barrels? When I ask a question I'd like to learn something. You're a little early here, haven't even considered buying the other things necessary to make a barrel. I'm thinking it might be something I'd be interested in doing some day. I have a lot of things I need to learn first.
Now I would like to know the answer to my original question, how accurate is a barrel made with a gun button compared to other methods??? This is a curiosity thing, there might be more barrel related questions, but not seriously considering making my own barrels YET!
The EDM thing was an idea for a special machine to burn barrel bores rifling and all. I understand there's a way to remove the recast layer through a process like electroplating, only in reverse. How good of a finish would that leave inside the barrel? Seriously, would the recast layer cause problems in a gun barrel??? I could see if it was super brittle, cracking all apart, and causing it to flake off from the shock of a bullet going through there, and an explosion. I dunno, just curious. I suppose there's a reason they don't manufacture gun barrels with EDM, because that does seem like an EASY way to do it. Put a piece of bar stock in the tank fixture, put the proper electrode on the end of the holder, and let it rip! A few passes, and you've got a barrel with a nice hard lining. You can get a pretty smooth finish with the right setup with an EDM, you have to go REAL slow. I was thinking the recast layer MIHGT be a good thing, but again, I'm not sure.