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Page Handguns » Gunsmithing & Troubleshooting
Archived [ARCHIVED THREAD] - H&K UPS 9 w/ SWR octane 9 double feed
Posted: 5/14/2014 4:50:58 PM EDT
Using a 14 lb wolff spring and Fiocchi brass 147 grain 9mm ammo. Brand new swr octane 9 HD2. Ran 100 rounds, had about 3-4 double feeds.

Mag, ONLY USED 1, was semi new, and never dropped.

New recoil assemble and suppressor, but the gun has about 1,000 rounds through it already.

New suppressor and new spring. Any ideas? Standard for breaking in a new Extra Power Spring?

Archived [ARCHIVED THREAD] - H&K UPS 9 w/ SWR octane 9 double feed
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