Storz Posted January 28, 2015 Share Posted January 28, 2015 So I have a 930 with a Nordic extension, before I took it apart and cleaned it she held 9+1 no problem and loaded just fine, now if I put 9 in the mag tube it wont chamber the first round. 8 it chambers the first one just fine, but with 9 in there it doesn't grab it for some reason. The only thing I can think is that the mag spring is binding up... Thoughts? Link to comment Share on other sites More sharing options...
mdschappell Posted January 28, 2015 Share Posted January 28, 2015 Mine started to do this after a short time when I first got the shotgun. There is a video on Brownell's that shows how to polish the shell latch. Once I did this, I never had problems with it again. From what I understand, it is a common problem with the 930 with an easy fix. Link to comment Share on other sites More sharing options...
Storz Posted January 28, 2015 Author Share Posted January 28, 2015 Thanks! Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
darkvibe Posted January 28, 2015 Share Posted January 28, 2015 Also make sure you don't have too long of a spring. Trim to 12" past the end of the tube. If it pushes rounds against the shell stop too hard it won't always release the first round. Link to comment Share on other sites More sharing options...
mpom Posted January 28, 2015 Share Posted January 28, 2015 The 12" past mag tube opening does not apply to oem/mossberg spring, only the stouter nordic or wolff, at least in my experience. Link to comment Share on other sites More sharing options...
Storz Posted January 28, 2015 Author Share Posted January 28, 2015 It has a Nordic extension, so would that also mean it has a Nordic spring? I bought the gun used with these bits installed already... Link to comment Share on other sites More sharing options...
darkvibe Posted January 28, 2015 Share Posted January 28, 2015 I don't know of a way to tell for sure. I would just order two new nordic springs (one as a backup) and trim one to 12" past the end of the tube and try it. Then you know what you have and know it's brand new. Have you made sure there isn't a bunch of crud behind your shell stop assembly? Link to comment Share on other sites More sharing options...
Storz Posted January 28, 2015 Author Share Posted January 28, 2015 I don't know of a way to tell for sure. I would just order two new nordic springs (one as a backup) and trim one to 12" past the end of the tube and try it. Then you know what you have and know it's brand new. Have you made sure there isn't a bunch of crud behind your shell stop assembly? Nope. Haven't even shot it yet, only had it about two weeks. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
mpom Posted January 28, 2015 Share Posted January 28, 2015 The factory spring has the ends of the spring formed into loops that don't leave the wire just sticking into the air, unlike the Nordic spring, where the wire end is same distance from next coil as rest of spring. Hard to describe, but the end of the factory spring is flat, not having a piece of wire just sticking out into space, ready to snag anything it can! Above advice makes sense, as any mag spring is going to wear out so its good to have spares, and start with a known good item. Link to comment Share on other sites More sharing options...
Storz Posted January 29, 2015 Author Share Posted January 29, 2015 Yeah in that case it appears to be a Nordic spring, it sticks out like 18" from the end of the factory mag tube length... Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Storz Posted January 29, 2015 Author Share Posted January 29, 2015 Is it 12" past the Nordic extension piece or 12" past the factory (handguard area) mag tube? Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Storz Posted January 29, 2015 Author Share Posted January 29, 2015 So this is what I've got. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
jid2 Posted January 29, 2015 Share Posted January 29, 2015 I had to polish and trim the shell stop to get mine to feed with a loaded tube. Since then no problems, and its been a few years meow. Link to comment Share on other sites More sharing options...
Storz Posted January 29, 2015 Author Share Posted January 29, 2015 What did you use to polish it? Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Nickoli Posted January 29, 2015 Share Posted January 29, 2015 I used sand paper to get the radius I wanted and then used rubbing compound for cars on a wool disc on my dremel. Every couple thousand rounds or so I will have to go in there and polish it again because I sense it is starting to act up. Link to comment Share on other sites More sharing options...
mpom Posted January 29, 2015 Share Posted January 29, 2015 (edited) Storz, what kind of cap goes on the end of the mag tube? I would measure the amount that extends beyond the end of the threads, once on the mag tube. I would cut the mag spring to 12 or 14" beyond end of tube, adding the length of cap to the measurement. Also bend the ends of the spring in just a bit so they cannot get caught on anything inside the mag tube. By shortening the spring you are creating more room for shells plus decreasing the pressure on the shell stop when fully loaded, so hopefully it will release the shell. Definitely do the mods with polishing on the stop as shown in the Brownell's article. Keep us posted. Article on shell stop mod:http://www.brownells.com/.aspx/lid=15831/GunTechdetail/Fixing-A-Mossberg-930-Feed-From-The-Tube-Problem Edited January 29, 2015 by mpom Link to comment Share on other sites More sharing options...
deadarrow Posted January 29, 2015 Share Posted January 29, 2015 What you need to do is buy a few new springs. Brownels has the best that I found. After you trim the spring to 12 inches try to see if it will load the first round. If not clip off a coil. Try it again. Once you are successful then make sure it will release the last round as well. If along the way you mess up and cut too much off then start over using a new spring. Springs are cheap so make sure you have several to start with. I had the same problem with my JM and did this method till I got it right. Now I know just what length works for my gun. I run a +9 Nordic tube on mine so I can't help you with a length that will work for you. Oh, I did polish the shell stop on mine as well. Sent from my iPad using Tapatalk Link to comment Share on other sites More sharing options...
Storz Posted January 29, 2015 Author Share Posted January 29, 2015 Thanks for all the info everyone, I am going to order a few springs and remove the shell stop tonight for some polishing. Link to comment Share on other sites More sharing options...
Storz Posted January 29, 2015 Author Share Posted January 29, 2015 Just got back from the range, didn't change a thing and it shot 100 rounds of mixed ammo no problems at all, it stripped the first round of the chamber each and every time as well. I am still going to fluff and buff and put in a new spring, but good to know it works for now Link to comment Share on other sites More sharing options...
Storz Posted January 29, 2015 Author Share Posted January 29, 2015 Polished! Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
JWS_61 Posted January 29, 2015 Share Posted January 29, 2015 Another tip on mag springs is don't leave the end of the spring essentially un-finished. By that I mean if it was not done by the manufacturer or you cut the spring, take a pair of pliers and bend the very end (about 1/4") back in on itself so that you do not have the sharp end of the spring wire sticking out to snag on the back edge of your follower or on the transition between your mag tube and extension. This will also kind of reduce the diameter of the spring coil a little on the end so that it fits into the back of the follower better. And if the spring ever gets away from you it will be less likely to snag or poke through skin or eyes etc. Jeff Link to comment Share on other sites More sharing options...
Storz Posted January 29, 2015 Author Share Posted January 29, 2015 Ok so I think its an ammo issue, when I went to the range today I only took a few rounds of my HD ammo. Federal Tactical "Flight Control", the end that rests against the shell stop isn't as smooth as some of the other ammo I used. For now I am just going to download it a round until the spring comes in, hopefully that fixes it. Link to comment Share on other sites More sharing options...
logiztix Posted January 29, 2015 Share Posted January 29, 2015 Polished! Sent from my iPhone using Tapatalk I also see a rather pronounced 'MIM mark' on the end that shell stop that is probably contributing to the problem. That 'seam' is a leftover from the MIM process of molding the part before the heat process. Carefully stoning that flush where it contacts the shell will also help as it is likely grabbing the soft aluminum lip of each shell. Link to comment Share on other sites More sharing options...
kennjen Posted January 30, 2015 Share Posted January 30, 2015 I had to polish and trim the shell stop to get mine to feed with a loaded tube. Since then no problems, and its been a few years meow. I'm sorry. But the very last word of your post made me smile. Sent from my iPad using Tapatalk Link to comment Share on other sites More sharing options...
darkvibe Posted January 31, 2015 Share Posted January 31, 2015 Ok so I think its an ammo issue, when I went to the range today I only took a few rounds of my HD ammo. Federal Tactical "Flight Control", the end that rests against the shell stop isn't as smooth as some of the other ammo I used. For now I am just going to download it a round until the spring comes in, hopefully that fixes it. I duck hunt with a 935 which has the same shell stop assembly. Federal shells give me more problems than other manufacturers. Like you said I think it is less polished. Link to comment Share on other sites More sharing options...
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