Mcgiiver,, While I agree with the body of your text, I disagree on the ONLY way you state. Guess What I don't have a lathe...And I have fixed several Rifle crowns. I used a Carriage bolt and a soft polishing wheel along with several grades of polishing compound. Takes a little more time, but time is one thing I got , besides I have intamate control over the process.... If this post seems a little Redneck, look at the box under my post...Be Safe>>>>Wally