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Discussion Starter · #1 ·
Need some help here on this forum. Involves a custom bobtail in .40.
Using (4) Metlaform 1911 mags in .40/357 Sig purchased new from Brownells and factory ammo.

Only one mag functioned without failure; two would not feed any rounds becasue they would not let the slide go into battery; and the fourth functioned intermittantly through one magazine of bullets. :scratch:

Thoughts on possible fixes?

Recoil spring change out? If so,what poundage?

Try different brand of ammo?

Extractor tuning?

Any constructive thoughts appreciated.

Thanks in advance.
 

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The rail is hitting the mag in the back, the notch needs to be filed deeper to clear the disco rail. And/or the tops of the lips are hitting.

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