My Sig, P220, .22 conversion was delivered about 10 days after shipping it it N.H. for repair or re-fitting. I went to the local indoor range (18 degrees outside) and began with Federal value pack pack solids. I could still feel resistance when cycling the slide and every other trigger pull resulted in a failure to go into battery with a new round. That really bummed me out, especially after reading the repair report alleging a successful test fire regimen by Sig.
I then switched to CCI Velocitors, thinking I needed a little more inertia on a stiff spring setup. No change, same problem. So, never losing faith in the inherent quality of the manufacturer, I took it all apart on the work bench to take a look.
The first thing I noticed, belatedly, was that the Sig repair process concluded with a complete cleaning of the frame prior to shipping. No lubricant remained on the rails or anywhere else for that matter.
Secondly and most significantly, I noticed a little accumulation of black plastic dust/shavings where the guide rod hole is located on the front of the slide. Examination of the black plastic (probably more technical terminology available from Sig) guide rod showed that it's diameter was very close to the size of the hole in the slide, causing contact friction and energy loss as the slide tried to cycle.
Proper lubrication and about three hundred manual slide cycles, fast enough to smell burning plastic, smoothed it all out. Now it chugs along without any problems at all and even eats the cheap Blazer ammo that my Ruger refuses.
As soon as it gets warm enough for my fingers to reload a lot of magazines, I'm going to play on the steel targets at the outdoor range. A great gift and money saver too.
Mac.
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