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Hey yall. Back in December, I decided to try the P320 Carry, my first and only Sig. I fell in love with the gun, it is accurate and easy for me to shoot well. I shoot quite a bit of steel case 9mm, and have quite a bit on hand. I expect any handgun I own to be able to shoot it in an emergency and at the range. The P320 ran the steel case at first, but over the last few months, it has began to completely choke on steel. Although I ensured the extractor and it's components were consistently cleaned, the P320 no chokes on every other round of steel and fails to extractor every time. I installed a Lone Wolf extractor hoping this might solve the issue, but it did not. I also ordered completely new extractor parts from Sig to replace them all, but decided I no longer trust this gun with my life and do not believe sending it back to Sig would solve anything, as they will only tell me not to run steel.

As a result, I made the choice to go back to an M&P, as the GEN 1 and 2.0 I've had over the years never malfunctioned with any type of ammo I ran through them. I now have a M&P9 2.0 FDE with the Truglo FTX sights on the way and plan to provide a complete range report.
 

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Have you scrubbed out the chamber of your 320? A lot of steel case ammo is lacquer coated to prevent rust and the lacquer can (and will) build up in the chamber and cause hard extraction and eventually failures to extract.
It damn sure will, and I don’t know of any steel cased carry ammo, anyway.

I learned better than to use that stuff more than a few years ago, and won’t shoot that crap in any of my guns.
 

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Have you scrubbed out the chamber of your 320? A lot of steel case ammo is lacquer coated to prevent rust and the lacquer can (and will) build up in the chamber and cause hard extraction and eventually failures to extract.
I'll second not shooting steel cased ammo. If you insist, be sure to clean it before leaving the range when the barrel's still hot and then scrub the chamber and breech face really well. ARs are just as susceptible to varnish build up.
 
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