. . . which leads to wringing (of the hands).
K.R., it is a standard step in fitting up a 1911 to take a file or scraper and add beveling to a barrel's locking lugs edges. This guarantees smooth meshing of the barrel lugs with the slide lug recesses, and avoids the problems Weshoot2 mentions; peening of the lugs to create a wire edged flanges that can separate and/or cause jamming.
When you consider the angle of a 1911 barrel in lock-up, you realize that only one lug bottoms out in its recess in the slide and that the faces of the back edges of the barrel lugs don't meet the recess partitions squarely. They were made the way they were for practical compromises to do with machining processes available in 1911. If J.M.B. were alive today, I have to believe he'd have been all over the possibilities for CNC machining, and would have done it a bit differently in some details.
