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Failure to eject

This is a discussion on Failure to eject within the Ruger Semi-Auto forums, part of the Rifle & Shotgun Forum category; Sorry for the long post in advance. I have a Ruger AR 556 that I have had for about a year now. I have been ...


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Old February 28th, 2017, 04:14 PM   #1
 
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Failure to eject

Sorry for the long post in advance. I have a Ruger AR 556 that I have had for about a year now. I have been reloading 55 grain VMAX for it with h 335 powder.

Today I tested some 68 gr. bthp with CFE 223 powder. While testing I was having a lot of issues with the empty brass not ejecting. I was using 25.8 grains of the above powder. I have never had any issue like the before unless I was using to light of a charge. However at the end of each test the bolt would lock back like it is supposed to. I was using once fired lake city brass that I got from a friend on the SWAT team.

Anyway, my question is do you think it could be a brass issue or a dirty ejector. I had not cleaned the rifle since I last shot it, but that session was only 40 rounds. I'm currently cleaning it right now so I guess I will answer that question soon. Any ideas would be greatly appreciated.

On a lighter note, here are the results of the test. I love this rifle.
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File Type: jpg IMG_20170228_155926622_HDR_1488330624541.jpg (4.69 MB, 19 views)
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Old March 1st, 2017, 04:05 AM   #2
 
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OK, looking at your powder charge and comparing it to Hodgdon's own data, I'd say you're charge weight is good. So I don't think it's a light load causing the bolt to cycle slowly or not far enough.

When you say fail to eject can you narrow that down a bit?

Is the casing jamming in the ejection port ? Or is it riding with the bolt head and returning to the chamber? Is the extractor pulling the empty casing out of the chamber ?

The first place I would look is the bolt head and make sure that both the ejector (which forces the empty casing to rotate around the extractor and throws the casing clear of the gun) and the extractor (which engages the cartridge case rim and pulls the casings from the chamber) are functioning.

If that brass is really only once fired, it should be fine. However, one of the common problems with LE ammunition is sometimes a particular casing gets cycled in and out of a chamber repeatedly without ever being fired. The operator clears the action and returns that particular cartridge to the top of the magazine. Those repeated cycles can chew up the cartridge rim on that one cartridge and that cause functioning problems.
Operators are frequently instructed to replace that top cartridge with a new cartridge to avoid that repeated damage to that cartridge rim.
You might have several casings from your SWAT buddies that got cycled through actions repeatedly before being fired.
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Old March 1st, 2017, 06:31 AM   #3
 
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Might need to take a bore brush to the chamber and lugs and give them a good scrubbing too.
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Old March 1st, 2017, 11:31 AM   #4
 
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Maybe try a lighter buffer/recoil spring combination? I was having trouble getting my 300 blackout AR to cycle reliably with both supersonic and subsonic ammo but eventually found a buffer-spring combination that worked.


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Old March 1st, 2017, 01:46 PM   #5
 
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try factory ammo to see if it is a gun problem.
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Old March 1st, 2017, 05:44 PM   #6
 
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I wouldn't make ANY alterations to the gun until the ammo is eliminated as the source of the problem. And the OP's loads seem to be inline with the reloading data.

I would guess he has some casings that have damaged rims or the gun is just dirty.
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