26 round Duramag Fail to Feed
#1
The first time using two 26 round Duramags, both gave me intermittent fail to feed stoppages. I only loaded 25, but was never able to shoot more than 8 or so rounds before they jammed. Every time this happened, the bolt was stuck on top of the mag with the round caught at the end of the feed ramps.

When I switched to Elander 17rd mags loaded to 15, no more issues.

Anyone have any suggestions on how to fix this?
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#2
Check the feed lips are holding the rounds correctly.

Use 2 rounds, insert one, check to see that the round is sitting in a manner to have the bullet tip pointing up slightly, if that round is good, insert the second.

Tweak the feed lip that needs it to get both rounds pointed slightly upwards.

Other then that take the mags apart, give them a good going over too make sure there's no trash are weld spots are flashing sticking off the follower that's catching.

Almost forgot, might sound dumb but make sure you seat them all the way to the back of the mag.
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#3
Feed lips seem to be holding rounds correctly and the inside of both mags look OK. I loaded both mags with 15 dummy rounds (that's all I have) and cycled each mag manually 3 times without any issues. I guess I could make 10 more dummy rounds, but I'd rather use the components for live ammo.
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#4
Check to see if the case mouth is contacting the front edge of the mag.

Non of mine hang up on it but you never know, could 've happening in yours.
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#5
Inspect the ejector as there should be a slight bevel to help permit the cartridge rim slide under the extractor and the case head to seat on the breach face. There is a simple modification you can do to try and eliminate a potential source of failure to feed. There could be a gas issue affecting the bolt speed and timing. To much gas or insufficient gas can cause the same type of stoppage. Insufficient gas can lead to failure to feed on new mags compared to mags that are worn in.


http://bulletin.accurateshooter.com/2014...artridges/
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#6
VASCAR2 Wrote:There could be a gas issue affecting the bolt speed and timing. To much gas or insufficient gas can cause the same type of stoppage. Insufficient gas can lead to failure to feed on new mags compared to mags that are worn in.

Yes! This would explain why I can manually cycle dummy rounds without any issues. I adjusted the gas with only one round loaded for the lowest setting that allowed the bolt to lock back. Next time out, I'll open the adjustment up 2 clicks. I'll post my results.

Thanks for your input!

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