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Djfan's picture
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Wad build up in shot gun barrel?

My boy's 20 gauge was jamming on every round. Took it to the local gun smith. He showed me a ring about 4" into the barrel from the action, that he said was small particles of was plastic that had burned onto the inside of the barrel. He said it was grabbing the empty shells and not letting them eject.

He recommended I get some solvent and scrub it out with that and a wire brush from my cleaning kit.

An hour and one sore shoulder later, it is still there, melted in the barrel.

Anyone ever had this, and how do I get rid of it?

Thanks.

Don Fischer's picture
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Wish I could help you but

Wish I could help you but never had it happen. You figure out how to get it out, plaese let us know. Wait, have you tried a steel brush? I got some by accident one time. Got new brushes thinking they were brass and they were steel. for rifles. never did use them. Something you might try is chucking up a chamber brush in a drill and spin the brush fast eniougt to heat the plastic and that might get it out. Just a though.

Come to thiunk of it, lf it is wad build up, what is it doing where it can catch a fired round? Is it hanging up on 3" shells? 

Tndeerhunter's picture
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cleaning

I'd also suggest (as Don has) to chuck up that brass brush with a variable speed drill and trying to hold it right on the "ring" and seeing if that doesn't wear it off.

Good luck!

Djfan's picture
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Thanks gents.  I am going to

Thanks gents.  I am going to try that, and think I will warm up the barrell first to losen the build up.

 

It still seems odd to me that this is causing the jam.  Somehow it doesn't ring true.  I'm going to clean it and shoot is soon.  It just seetms too strange to be legit.  Why hasn't this happened in my other shotguns?  Why have I never heard of it before?  After only about 150 rounds this happens, but after countless thousands of rounds through my Mossberg it has exactly no build up? 

 

I'll keep you posted.

Critter's picture
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I don't know how a

I don't know how a obstruction in the barrel such as a wad build up would cause the shotgun to jamb, but I guess anything is possible. 

To warm or heat the barrel up I would suggest that you remove the barrel and get some boiling hot water.  Place the barrel into the water to the point where the build up will be below the surface plus a couple of inches and start working the brush in that area while the barrel is still in the water.  You'll have to do this from the muzzle end.  The combination of the boiling hot water and the brass or even a stainless steel brush should get rid of the build up. 

possum's picture
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Strange

It seems strange to me that the ring is about 4 inches into the barrel but it is grabbing on something. How is that possible when you can only get 3 inch shells for a 20GA ? The burn ring would be well ahead of the chamber in my mind....would'nt it ?

 When you say his 20Ga jams, does the shell hull stick in the chamber ? Is your extractor maybe weak and not grabbing the case head ? Is the gun a pump or auto ?

Djfan's picture
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The gunsmith who told me

The gunsmith who told me about the problem as I have described it here saw nothing with the rest of the gun.  I am off on the 4".  It's actually about 2.5" - 3.5 inches in.

 

It's a pump.

Tndeerhunter's picture
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Jamming

I did not notice what type SG you're having the problems with, but I had a similar problem (constant jamming) with a Rem M1100 that was cured by replacing a single, simple rubber "O" ring. A very inexpensive fix. Good Luck!

Djfan's picture
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Thanks Tn. It's a Sarpa Arms

Thanks Tn.

It's a Sarpa Arms (Turkish gun).  It has an excellent reputation.  Google it.

I wouldn't even know where that o-ring would be.  I have a buddy who is pretty good at this stuff, who wants to go shoot it with me.  Cleaning it today, shooting it on 12/26.  Here's hoping!

Djfan's picture
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So, I tore it apart, cleaned

So, I tore it apart, cleaned the heck out of it, bought a steel brush and brushed/soaked the barrell a ton of times, and thought "this is getting me no where!!"

So, I decided to take it to town to get the gunsmith on it. On the way we stopped in a field and shot it. It was flawless with 2.75" and 3" rounds. Not sure what I did, but it seems to be working just fine.

I really have nothing to say here because I really don't know what I did right, but I appreciate you all offering insight.

Critter's picture
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Quite ofter when a firearm

Quite ofter when a firearm starts to malfunction all that is really needed is a really good cleaning. 

I really couldn't figure out how some kind of build up in the barrel would cause a problem ejecting a shell. 

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