Recoil springs

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   I have had an interesting observation, my Inand took up having issues with weak extraction and failure to feed randomly. 
The failure to feed was always with 30 round mags, worse if the mag was fully loaded and the weak extraction was not all the time but regular.  Factory and hand loads.

Comparing my two rifles I noticed the recoil spring on the Quality Hardware rifle was more aggressive, I replaced the spring on the Inland just because it was needed. 

Not only did it resolve the feeding issue with the full 30 round mags but the weak extraction disappeared. I can run my 30 round and 15 round mags with zero failures. 

The stripping of the rounds makes sense but I can only surmise that the springs more positive forward pressure on the slide prevents the rearward movement of the slide until the pressure curve builds up.

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David Milisock Members Profile Send Private Message Find Members Posts Add to Buddy List On Point Joined: Aug 03 2019 Location: USA Status: Offline Points: 334	Post Options Post Reply Quote David Milisock Report Post Thanks(0) Quote Reply Topic: Recoil springs Posted: Nov 20 2019 at 4:39pm
	I have had an interesting observation, my Inand took up having issues with weak extraction and failure to feed randomly. The failure to feed was always with 30 round mags, worse if the mag was fully loaded and the weak extraction was not all the time but regular. Factory and hand loads. Comparing my two rifles I noticed the recoil spring on the Quality Hardware rifle was more aggressive, I replaced the spring on the Inland just because it was needed. Not only did it resolve the feeding issue with the full 30 round mags but the weak extraction disappeared. I can run my 30 round and 15 round mags with zero failures. The stripping of the rounds makes sense but I can only surmise that the springs more positive forward pressure on the slide prevents the rearward movement of the slide until the pressure curve builds up.
	David Milisock

Jt22453 Members Profile Send Private Message Find Members Posts Add to Buddy List On Point Joined: Feb 11 2019 Location: Central Indiana Status: Offline Points: 114	Post Options Post Reply Quote Jt22453 Report Post Thanks(0) Quote Reply Posted: Nov 20 2019 at 4:53pm
	Yep, weakened recoil springs can cause lots of problems, as can the supposed high power springs. Glad you fixed your problem without replacing a bunch of parts unnecessarily. Recoil springs and mag issues seem to be the biggest issues with carbines in regards to reliability.

David Milisock Members Profile Send Private Message Find Members Posts Add to Buddy List On Point Joined: Aug 03 2019 Location: USA Status: Offline Points: 334	Post Options Post Reply Quote David Milisock Report Post Thanks(0) Quote Reply Posted: Nov 20 2019 at 4:56pm
	I'm 65 years old and I've got issues my Inland is 70+ so I'll cut it some slack. With that said she's running like a Swiss watch now.
	David Milisock