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Feed Issues, Rock-ola James River Armory

This is a discussion on Feed Issues, Rock-ola James River Armory within the Modern M14 forums, part of the M14 M1A Forum category; I recently purchased a slightly used James river armory with a Rock-ola receiver. After the first 200 hundred rounds I have a consistent failure to ...


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Old April 19th, 2017, 01:21 PM   #1
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Feed Issues, Rock-ola James River Armory

I recently purchased a slightly used James river armory with a Rock-ola receiver. After the first 200 hundred rounds I have a consistent failure to feed 1 in every 5 magazine fails to feed, although the hammer is cocked and fires. The same results with 4 different 10 round magazines, 3 Checkmate and 1 Springfield, all new. Two different brands of NATO ammo. Rifle is super accurate, but failure to feed is extremely disappointing. Occasionally a round is jammed at a 30 degree angle in the breech. Any advice would be extremely welcome. Gas system is clean, although I haven't done a complete disassembly, just piston removal and cleaning.
Phil

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Old April 19th, 2017, 01:53 PM   #2
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Time to break your rifle down, clean it and grease all metal to metal contact areas. Do a good scrubbing on the chamber with a chamber brush and leave it dry and shiny.
Clean and lube will make her run like a champ.
You might also check the underside of the feed lips on your mags for burrs and sharp edges that might be cutting into your brass upon feed attempts. Checkmate makes the SAI mags so they should be the same. 10 rounders are noted for difficulty feeding.

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Old April 19th, 2017, 01:59 PM   #3
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Listen to what you where just told, there is nothing else to say.

Welcome to forum.

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Old April 19th, 2017, 02:05 PM   #4
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install new extractor/ejector springs to start.mark all your mags with numbers and see if this happens with all or 1 particular mag,or all the mags.might be a weak mag springs.
check extractor for burrs.

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Old April 19th, 2017, 02:58 PM   #5
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You are going to have to describe "failure to feed" with a little more detail.

Does the bolt strip the next cartridge from the magazine, or is it closing on an empty chamber?

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Old April 19th, 2017, 03:57 PM   #6
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Kurt, in our terminology it is short stroking. He says it's cocked and fires which I assume means dry fires. I'm no expert but it sounds to me like it needs some oil/ grease.

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Old April 19th, 2017, 04:05 PM   #7
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Originally Posted by nf1e View Post
Time to break your rifle down, clean it and grease all metal to metal contact areas. Do a good scrubbing on the chamber with a chamber brush and leave it dry and shiny.
Clean and lube will make her run like a champ.
You might also check the underside of the feed lips on your mags for burrs and sharp edges that might be cutting into your brass upon feed attempts. Checkmate makes the SAI mags so they should be the same. 10 rounders are noted for difficulty feeding.

Semper Fi
Art
I did a very thorough cleaning when I bought it. Chamber is shiny. All lubed up per the videos on You Tube. I'll check the mags. All 4 fail to chamber a round.

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Old April 19th, 2017, 04:10 PM   #8
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install new extractor/ejector springs to start.mark all your mags with numbers and see if this happens with all or 1 particular mag,or all the mags.might be a weak mag springs.
check extractor for burrs.
I always number my magazines, habit learned when shooting competition. I bought 3 new magazines just to eliminate a bad mag.
I haven't replaced anything, but it seems the extractor assembly is the most common issue.
I was surprised no one thinks it might be a piston /gas problem. I am very liberal with grease and oil, so its probably not that.
Thanks all.

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Old April 19th, 2017, 04:10 PM   #9
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Point the rifle in a safe direction and smoothly feed and eject a few rounds manually and observe how the tips of the bullets enter the chamber. If they're hitting below the feed grooves at the breech, you may have an out of spec op-rod spring guide. The back of the spring guide is what latches on to the front of the magazine. If this part is worn or out of spec, it can let the front of the magazine sit too low for smooth feeding.

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Old April 19th, 2017, 04:19 PM   #10
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something doesn't add up.

Quote:
Originally Posted by Wasted ammo View Post
Kurt, in our terminology it is short stroking. He says it's cocked and fires which I assume means dry fires. I'm no expert but it sounds to me like it needs some oil/ grease.
My M1A cycles just fine when it's bone dry.

They are not that finicky. or at least not suppose to be.


OP I'd be sending her back to JRA.

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Old April 19th, 2017, 04:22 PM   #11
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Again. Is the bolt stripping the next round from the magazine?

What is Nato ammo? Does it have a name on it?

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Old April 19th, 2017, 04:53 PM   #12
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still would look at the extractor/ejector spring issue first. gi extractor?

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Old April 19th, 2017, 05:05 PM   #13
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Again. Is the bolt stripping the next round from the magazine?

What is Nato ammo? Does it have a name on it?
7.62 mm NATO, BALL, 150 grain FMJ by Isrsaeli Military

7.62 mm x 51mm M80 147 grain FMJ by ZQI ammunition

Bolt is not stripping the next round from the magazine.
Rounds are being ejected at about 3 o'clock



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Old April 19th, 2017, 05:05 PM   #14
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I suspect the action simply isn't getting enough power.

1. The gas cylinder isn't lined up correctly.
2. The spindle valve is dirty or not fully open.
3. There is a grooved piston in it.
4. The gas plug is loose.
5. The ammo was not designed for an M14.

As stated above. Insert a loaded magazine, pull the oprod handle all the way to the rear and release it. Repeat. If each round chambers and extracts, then it is one of the issues I mentioned.

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Old April 19th, 2017, 05:07 PM   #15
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still would look at the extractor/ejector spring issue first. gi extractor?
Not sure of source of extractor. JRA supposedly uses almost all GI parts.

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