Choke tube thread issue

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RaysBoi

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So as the title goes, I have an issue with my shotguns choke tube threads. The problem is I can't fully thread my choke all the way in. It will thread in snugly for about 1/4" then bind up and stop. If I flip the tube around and screw the threads in the other way, the same thing happens. Looking at the threads it looks like someone drove an incompatible choke in about 1/4", maybe less. My question is, am I holding onto a paper weight? Is there anything I can do about this? I assume finding a tap for a mobil choke is pretty much impossible, especially in 20g as my gun is. Do gunsmiths do that sort or thing? And how much would you think it costs? My gun was 190 to my door, I'm not spending an arm and a leg on it.
 
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You will have to find a smith with the correct tap and have him run the tap in and see if that fixes it...
 
If everything fails try: put some oil on it, screw it in as far as you can then gently tap choke around with soft metal so you don't damage choke. Turn in some more and tap till you get it all the way. It works with messed up bolts , ready rods, nuts etc. Should work with choke thread as well.
 
Vic1 said:
If everything fails try: put some oil on it, screw it in as far as you can then gently tap choke around with soft metal so you don't damage choke. Turn in some more and tap till you get it all the way. It works with messed up bolts , ready rods, nuts etc. Should work with choke thread as well.
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Bad advice in my opinion...
 
RaysBoi said:
Thanks for the response.i figured that was going to be the fix. I'll see if I can find someone locally
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Are you sure you have the correct tube for the barrel to start with? What make/model is the barrel? Get to to a smith who installs 20 gauge tubes is you best bet...
 
It's the right choke. It's a midland backpacker and it takes mobil chokes, I'd try a new choke but they're kinda a ##### to get and the choke threads look mint
 
Vic1 said:
If everything fails try: put some oil on it, screw it in as far as you can then gently tap choke around with soft metal so you don't damage choke. Turn in some more and tap till you get it all the way. It works with messed up bolts , ready rods, nuts etc. Should work with choke thread as well.
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guntech is correct but IMHO he wasn't explicit enough.
 
Well you asked for advice, now what? A gunsmith with 50+ years of gunsmithing experience suggests one thing. An unspecified tradesman suggests something completely different which he has used successfully on nuts and bolts with low value but not on guns with super fine choke threads. One system will not damage the original threads, the other idea will change them forever. Remember, Beretta Mobile threads are not compatible with any others except Benelli, trying to force a different brand choke tube in there will ruin the barrel threads and the choke tube threads forever, they won’t fit anything properly, won’t interchange and have a good chance of blowing out of the barrel or seizing in forever. Your gun, your choice. Choose wisely.
You paid $190 for a damaged gun. IF you can get it fixed by a knowledgable gunsmith so that choke tubes interchange correctly for a price that you can accept then that cost adds to your total investment in the gun. If it’s worth it to you to have it done correctly, this is the way to go. If the cost is too high, have the barrel properly shortened just behind the choke threads, you’ll have a great cylinder choke grouse gun. If you don’t use it like this you can sell it without a guilty conscience and start over.
 
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Ahh I see. Didn't know he was a experienced Smith. Ya I'm gunna see if there's a smith in town but not 100% sure anymore.it was a cheap gun so if all else fails I'm hammering the sob in. Failing that idk, chop the barrel maybe but then I gotta get sights and yadda yadda. Kinda sucks cause I've been looking for one of these for a couple years but never would have bought it had I known the threads were messed up. If I do fail to find a dmith and tap the choke home, I'll post my results.
 
Get a flashlight and have a good look at the threads, perhaps you can see what is causing the issue. Fine threads are prone to getting obstructed . A dental pick is helpful, and it can be used to clean the threads and/or remove swarf.
 
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Ok so after a shift at work and a nights sleep I went at the gun today. First thing I did was really get it into the light and had a good look at the threads. What I found was encouraging. The threads were chewed up to be sure, but nothing cross threaded and the "pitch" looked normal. What I think is happening is the threads in the barrel are cut normally, in the classic "v"(probably a term for that). The threads on the choke have a square cross section. That never caused an issue on my other shotty but I think this one's cut a little tight so the choke was binding up. Ended up using a small file to cut grooves perpendicular to the choke threads on the choke, essentially creating a make shift tap out of my choke lol. I tapped the barrel with the choke and now it screws in flush, my choke wrench is trashed, and I have arthritis but it's in. So tomorrow I'll take the gun to the range and make sure it's shooting straight. That's the saga. Thanks for the suggestions everyone. Btw, I know that the smart decision would have been to take the gun to a smith. No doubt. Problem is last year the only gun shop in town that had a gunsmith closed down their doors so I got a little creative. Sue me.
 
Thanks for the tip. I actually did give it a good swipe with some quality grease.btw the choke did a surprisingly good job of cutting the threads. I can screw it in by hand until the last 1.5 threads which surprised me quite a bit.

Considering how admittedly stupid the whole plan was
 
Very true. I'd never suggest someone else do what I did. He'll, I'd send the gun back if I bought it new but that wasn't the case. Either way I think I got a bit lucky with that one
 
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