To recap: Cleaned and oiled new gun. Put 150 rounds through it, mostly 230 grain Hydroshok. Almost never got through a mag witout failure to feed. Two failure modes, jammed at the start of feed ramp or more frequently just before completely chambering. Always failed in middle of eight-round magazine, never at top or bottom. Didn't matter which magazine. SIG sent return authorization and paid postage. Got gun back in 12 days, with gunsmith note that nothing was wrong with pistol.
Current: Went to range Monday. Fired another 150 rounds or so, mixed bag of hardball, 230 grain Hydroshok, 230 grain Silvertips. No feeding failures while firing. Did have four failures to completely chamber the first round when dropping slide with slide stop. No failures with manual chambering.
Possibilities:
- I had done just enough shooting to settle the gun in before running out of ammo at first firing session. (The last two mags did feed ok that day.)
- Gunsmith did something he did not tell me about.
- The flight was good for the pistol.
Got to do another extended range session to develop some confidence in pistol. Also, start accuracy assessment. I sure hope that this problem is solved, since I really like this pistol.
Current: Went to range Monday. Fired another 150 rounds or so, mixed bag of hardball, 230 grain Hydroshok, 230 grain Silvertips. No feeding failures while firing. Did have four failures to completely chamber the first round when dropping slide with slide stop. No failures with manual chambering.
Possibilities:
- I had done just enough shooting to settle the gun in before running out of ammo at first firing session. (The last two mags did feed ok that day.)
- Gunsmith did something he did not tell me about.
- The flight was good for the pistol.

Got to do another extended range session to develop some confidence in pistol. Also, start accuracy assessment. I sure hope that this problem is solved, since I really like this pistol.