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Feb 12th, 2024
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 6.5 Grendel fault to eject question
#5576748
02/01/15 09:14 PM
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Joined: Jul 2012
Posts: 877
wtjim
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Recently built a 6.5 Grendel from all quality parts. When shooting it is sub-MOA, feeds and extracts as it should. Occasionally a spent case is not being ejected. I'd say 1 in 10 which is way too much for me. The bolt is made for the barrel by a reputable manufacturer. I am wondering how to solve this. Thank you for the replies.
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Re: 6.5 Grendel fault to eject question
[Re: wtjim]
#5577569
02/02/15 04:39 AM
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Joined: Jan 2011
Posts: 21,373
Bullfrog
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![[Linked Image]](https://krdesignsco.com/wp-content/uploads/2019/02/pig.gif) Man if I knew what Oxner knows I could throw away what I know
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Re: 6.5 Grendel fault to eject question
[Re: wtjim]
#5577583
02/02/15 04:51 AM
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Joined: Jul 2012
Posts: 877
wtjim
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Sorry title should say "fail" not fault. Semi automatic AR style rifle.
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Re: 6.5 Grendel fault to eject question
[Re: wtjim]
#5577626
02/02/15 05:16 AM
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Joined: Jan 2011
Posts: 21,373
Bullfrog
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Ahhhhhhh! The AR peeps will be along shortly. What ammo you running? I know they'll ask that
Man if I knew what Oxner knows I could throw away what I know
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Re: 6.5 Grendel fault to eject question
[Re: wtjim]
#5577960
02/02/15 02:45 PM
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Joined: Jul 2012
Posts: 877
wtjim
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Posts: 877 |
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Re: 6.5 Grendel fault to eject question
[Re: wtjim]
#5577989
02/02/15 02:59 PM
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Joined: Feb 2009
Posts: 1,308
Precision_Shooter
Pro Tracker
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Pro Tracker
Joined: Feb 2009
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Steel or Brass cased ammo?
Extractor Spring ok?
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Re: 6.5 Grendel fault to eject question
[Re: wtjim]
#5578038
02/02/15 03:26 PM
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Joined: Jun 2014
Posts: 329
bside
Bird Dog
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Bird Dog
Joined: Jun 2014
Posts: 329 |
Where is your ejection pattern when it does eject?
You're likely over or under gassed
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Re: 6.5 Grendel fault to eject question
[Re: wtjim]
#5579401
02/03/15 03:41 AM
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Joined: Jul 2012
Posts: 877
wtjim
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More forward than back. Gas block on straight and running carbine weight spring/buffer.
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Re: 6.5 Grendel fault to eject question
[Re: wtjim]
#5579791
02/03/15 01:55 PM
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Joined: Jun 2014
Posts: 329
bside
Bird Dog
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Bird Dog
Joined: Jun 2014
Posts: 329 |
You seem to be overgassed based on your description. I would go with a Heavier buffer and optionally a stiffer spring ( Wolff). Handy chart: 
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Re: 6.5 Grendel fault to eject question
[Re: wtjim]
#5581016
02/04/15 02:52 AM
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Joined: Jul 2012
Posts: 877
wtjim
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bside,
Thanks for the visual, I've never seen that. I'm a lifelong bow hunter that has recently gotten into guns the past couple years. I'm gonna try a heavier buffer.
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Re: 6.5 Grendel fault to eject question
[Re: wtjim]
#5581068
02/04/15 03:12 AM
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Joined: Jan 2011
Posts: 21,373
Bullfrog
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That is a cool graphic. Good reference to have
Man if I knew what Oxner knows I could throw away what I know
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Re: 6.5 Grendel fault to eject question
[Re: wtjim]
#5581808
02/04/15 04:10 PM
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Joined: Jun 2014
Posts: 329
bside
Bird Dog
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Bird Dog
Joined: Jun 2014
Posts: 329 |
you're welcome. I'm an AR guy first so I'm happy to help
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