What would cause this failure to feed?

It seems like the brass case is catching on something around the barrel, but the entire circumference is smooth and clean. Any thoughts? The same thing happens on every round when fed manually, it functions about 1/2 the time when firing. Same problem with different mags and various ammo. It appears to be a correct barrel for the receiver (USGI WWII rebuild) and seems to be in good condition. More photos of the rifle can be seen in my other recent thread here:

https://www.milsurps.com/showthread.php?t=57510

Suggestions would be greatly appreciated.
Thanks in advance,
Bob
https://www.milsurps.com/images/impo...3oxukoml-1.jpg

Perhaps the chamber needs a bit of paper polishing on a mandrel? Perhaps the mag catch is allowing the mag to sag down? Hand feeding is never a good measure of how a weapon works though. Try holding the mag up when operating or firing. See if that sorts it out?

Jim,
Thanks for the quick response, headed to the range now and I'll let you know how I do. I'll see if I can figure out how to adjust the mag catch.
Sincerely,
Bob

Mag catch is adjusted by replacing it.

I wonder if he used the same Mag checking the other rounds. When that happened to mine I had a backwards spring. But first I used another Mag and it fed properly so I opened up both of them and the one that cause that problem the spring was backwards.

Still does no feed correctly. I've tried various mags and all the mags appear to be assembled correctly and do seat the same as the other carbines I have. Since this is a rebuilt carbine it has been reparkerized and I am guessing the polishing is the correct path to repair as Jim noted. I have 600 grit sandpaper and fitz metal polish but before I move forward I am wondering:
1) where do I polish
2) what grit should I start with
I am thinking that a very light touch with the 600 to remove the parkerizing and then polish with the fitz and dremel tool. Is that correct?
Bob

FMJ or soft points?

If polishing, you need to spin for the best result. That would be a slotted end rod, very thin in a drill chuck. Oil and 600 paper at low speed for a few seconds to under a minute. Then clean and check. You'll be working from the rear of a stripped carbine receiver. You almost need a flexible shaft like a hone shaft. In and out doesn't work as evenly.

Quote:

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Originally Posted by CrossedCannons

FMJ or soft points?

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FMJ, good question!

Have you checked the recoil spring. A good USGI spring should be 10.25" long. 10" or less it is too worn. Worn recoil springs cause numerous feed issues.

I've had this problem before on one of my Carbines and i just almost yanked all my hair out trying to figure out what was happening. One thing that did help I loaded only 14 Rounds and see how it fed from the left side of the mag and it started to work, but I knew there was still a problem. I even inspected the face of the Bolt just to see to see if there was anything wrong. If you can't find out the problem with what Jim or Bonnie just recommended I did finally find out what it was, but I had to do a little something not really what you should do, but I did it and it has worked ever since. I'll just wait to tell you after you tried everything first. I would have to take pictures and mark where the problem was. My friend came by to visit and i told him what im dealing with and he looked it over and fixed it in less than 10 minutes it's requires using a small ball pin hammer.

I would try another mag. It could be that the feed lips on that mag got bent down. The case won't release properly if that is the case and can cause that same feeding problem.

---------- Post added at 10:00 PM ---------- Previous post was at 09:58 PM ----------

I would also check the mag release. It can also cause feeding problems.

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Originally Posted by jimb16

I would try another mag. It could be that the feed lips on that mag got bent down. The case won't release properly if that is the case and can cause that same feeding problem.

I would also check the mag release. It can also cause feeding problems.

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I guess you read the OPs question and just rushed to answer...if you check, he's tried several mags and I already suggested the mag release...so...

Polishing the chamber doesn't generally fix feed problems, at least not the kind that you showed us in your picture. Since you experience the problem with various brands of ammo and various mags, I think we can rule these out. So what's left...The bolt and the feed ramp in the receiver. Unless it's obvious that someone has modded the feed ramp, then that leaves the bolt. I would replace the bolt with a spare, or try one from another carbine (if you have more than one)and see if that corrects the problem. If you don't have access to a spare bolt etc., then disassemble your bolt if you are able, or get someone with the disassembly tool to do it if you can't. Re-install the stripped bolt and see if it will then feed properly without the extractor, firing pin and ejector. If it does, then there is an issue with one or more of those components. Usually, it's either the extractor or ejector if it's a bolt related feed issue.

Let us know what you find.

Sorry BAR. Must have been half asleep!

Ok, thanks everyone for the suggestions. I did pull it apart and cleaned everything and took it to the range. Still a no go. Measured the spring, it's fine. Mag fits well compared to my other carbines. I did notice a slight burr inside the receiver on the left side and cleaned it up but still a no go. I'll pull a bolt out of one of the other carbines that I know works fine and see if that gives us any clues. Thanks everyone for the suggestions so far. I'll update this thread, hopefully tomorrow.
Regards,
Bob

Anyone know if he got this straightened out?

Charlie-painter777

Did he check head space, extractor, spring and plunger gummed up?

Hi Jim,
I m not sure if he's go to go or not. I stumbled upon this roaming thru some back threads.
I get a warm fuzzy feeling when we can be of help.
I just sent him a PM asking.
Guess we'll see......... hoping he didn't end up smacking it against a tree like I've been known to do back in my 'Fighting Anger Issues' days when younger!

Thx for the happy b day.

Charlie

The problem I've been having is not feeding it's extracting. I've changed the return spring with a brand new Wolfe and replaced the extractor springs and still jam at least 2 out 0f 3 every mag using a variety of mags and ammo. Then I notice the recoil plate was loose and I haven't fire it since even though it's the sitting next to the back door waiting for that next suicidal deer.

Quote:

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Originally Posted by TDH

a brand new Wolfe

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I'd rather use brand new USGI or factory then Wolfe. They tend to be over strength. Have you tried polishing the chamber?

Quote:

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Originally Posted by TDH

The problem I've been having is not feeding it's extracting

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Look for burr on the extractors lip, would be my first thought.

I had this very problem that I mentioned in post #11. I tried everything that I was told to try. I tried different mags different bolts, mag catches I even changed out parts in the Bolt. The feed ramp was find and I gave up. I don't remember who it was that mentioned it to me back then. I didn't understand how what somebody told me what the problem could be I left it alone. Then one day this friend came by who had Collected Carbines and I told him about the problem and he looked it over and asked for a Mag then he inserted the mag ( fully loaded) and he saw something that I didn't. He asked me for a small ball pein Hammer and did some very slightly tapping. It was the left side lip that sits on top of the mag. Can someone explain why it started working correctly after he did it this...all I can say is what he said. Some People when insering the Magazine they Palm Smack there Mag when inserting them and after doing this along time and if the mag catche is worn you will have feeding issues. Was he Correct ? The Carbine has worked just great ever since he did that.

****UPDATE*****
Polishing, mag changes, mag cleaning, ammo change, spring swap with another carbine and a host of other things and it (and the other carbine continued to work) started working. What made the difference? I really have no idea as a few trips to the range with ongoing failures and I decided to start over and the problem is fixed.

If I had to guess I say it was likely a combination of things but primarily newer parkerizing and lack of a complete lube. I took it completely down and cleaned/lubed and although it wasn't dirty, unusually dry or had any other problems it started working.

Thanks to all for the suggestions and support.

Sincerely,
Bob

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Originally Posted by bczandm

What made the difference? I really have no idea

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Because you didn't try the repairs one at a time...now there's no testimony to confirm the fault. We all have no idea. Glad it works now anyway.

'I took it completely down and cleaned/lubed and although it wasn't dirty, unusually dry or had any other problems it started working.'

Guns like this - they really do. Your bolt was probably dragging in the receiver.