Ar-15 cycling issues.

Status
Not open for further replies.
C

Ccctennis

Member
Joined
Mar 2, 2014
Messages
357
I posted a thread during the summer with a cycle issue in my rock river ar-15

I took lots of suggestions and went back to range this week.

I used a slower burning powder. BL-C2
I also used a larger pill 75 grain

All was working fine. Fired about 50-75 rounds with no issues at all. I was about to leave and grabbed a different mag and all of a sudden same issue. Case didn't eject and next round was fed up against fired case.

Immediately switched mags and gun functioned properly. Is it possible that a bad mag could cause this issue? I understand feeding issues being linked to a mag but didn't think it has any effect on bad extraction???


My rock river doesn't have a gas adjustment system. I'm trying to narrow down variables.

Side not took a box of rounds that didn't not eject properly this past summer and they ran perfectly today. Slide doesn't always lock back when last round ejects? Under gassed? Over gassed? Mag issue?
 
What load are you using and what magazines? The RR or some other. Which mags work.

Also could be the recoil spring. My AR 15 (RR) new had a bad one,
 
Load

75 grain hornady bullets
BL-c2 powder. 22 grains

I used p-mags. One p mag worked and one didn't
 
22 grains of BLC-2 is a full grain under minimum for a 75. Any issues with factory ammo?
The mag may be up too high and causing interference with the bolt's travel, but if changing mags makes the issue go away, it's a cheap fix.
 
Do you have the correct buffer installed for your stock type?
Is your gaskey properly staked and installed tightly?
gastube glogged or dirty? (I've never seen a gastube that was THAT dirty to cause a cycling issue though....)

the magazine that doesn't like to feed, are the lips bent on it at all, or higher/lower than the other magazines?
are the rounds factory rounds or reloads? are they the proper length?

Just a few items I'd look at if I had that issue.

Mike B
 
Book

That recipe,isn't under minimum in my hornday book. It is actually .2 above minimum for 75 grain. I only shoot reloads. I haven't shot factory ammo in years. This summer I thought I was loading too light and then bumped up towards the high end and still had same issue
 
If your gun works fine with one magazine and not with another it would seem to be a magazine issue. Ideally, you would try some more magazines; if several others worked fine then you could be more assured that the magazine was the culprit.
 
Hornday load data consistently starts at lower amounts than Hodgdon does. Both are very conservative.

I use Hornady data for a lot of handloads. pistol and rifle. They make the bullets and test them.

That said, some data is pretty low. Compare the Hornady data to the Hodgdon dat. Hodgdon uses a different bullet but their range is 23.0 to 26 gr.

You have room to bump it it up a little and see how those work. Just a suggestion.
 
need some more info on the not extracted case. did it stick in the chamber, was there extractor marks, did it come right out, new gun?
 
Extracted case needed a nice smack from my cleaning rod to extract. It didn't rip the case mouth off this one this evening. There wasn't any marks on the case bottom
 
if the extractor did not leave marks and the case was in there good enough for a smack with a cleaning rod i would want to look at the bolt if it was me. No bulge in the case means to me that it is chambering completely but maybe the extractor for some reason is not engaging the rim part of the case as it should. May just need some shoot and clean shoot and clean to "break in" the gun if it is new.
 
Status
Not open for further replies.

Similar threads

marksman13
  • Locked
Suppressed Cycling Issues with AR-15
Replies
24
Views
2K
marksman13
marksman13
W
  • Locked
5.56 reloading issue
2
Replies
36
Views
2K
Skgreen
S
greyling22
  • Locked
help! 308 sizing issue with my new xbolt
2
Replies
41
Views
1K
nettlle
nettlle
A
  • Locked
PSA AR9 not cycling 147gr
Replies
16
Views
4K
wally
wally
M
  • Locked
9mm cases not ejecting.
2 3
Replies
53
Views
7K
Muddydogs
M
Back
Top