New, recently built Open gun. Gun is still in the white. I am not the original owner. Original owner claims to have fired about 50 flawless rounds.
Ran flawlessly for 500 rounds. Shortly after, it was not ejecting reliably; casing would get stuck in ejection port. Not a classic stovepipe but with the casing paralell to the ground.
After another 100 rounds, the slide locked back, partly but not completely to the rear. By "locked" I mean seriously locked.
Gentle tapping with a rubber mallet freed the slide. Disassembly and cleaning revealed a gun that, well, had been shot about 500 rounds.
On reassembly the ejector would not allow the slide to move past it; the left corner of the ejector was blocking the slide movement. Light....fractional...micron removal...from the ejector cleared up the problem.
Shokbuff was removed; 10lb spring was removed and replaced with a 9 lb spring. Gun was oiled and reassembled with no drama.
Another 150 rounds were fired with no drama. At about round 150, slide again locked back, partially to the rear.
Smith is very well known and respected. I've contacted him as well, but am hoping that somewhere here has a quick fix that I am missing.