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Mag interrupter
Posted: Thu Apr 19, 2018 4:09 pm
by Riva9999
Hi folks,
Is the interrupter supposed to keep the cartridges from rim locking? What has been your experience with this working, if so? Mine isn't great, even with pretty strong springs. Is there a 'cure' I can perform? Loading the clips a certain way almost always fails due to jostling during handling.
Thanks,
Aaron
Re: Mag interrupter
Posted: Thu Apr 19, 2018 4:36 pm
by tjtM38
Some of the guys on here may be able to discuss the Finn improvement that was made to the interrupter/ejector. I don't own a Finn, but I think they had a little better system. There is no real cure; it is one of the weakness of this rifle. I preload the strippers so there is the least possible chance of rim lock. When I load a srtipper, I load it grasping the top round and pushing down the other rounds below the interrupter. This leaves the first round above or in battery ready to chamber. The big fat rims are a real problem. I am trying to imagine a peasant-farmer turned soldier trying to load his rifle with gloves in sub-zero weather. I am sure they figured out a process real quick or paid with death if they didn't.
Re: Mag interrupter
Posted: Thu Apr 19, 2018 4:38 pm
by Lotema
Riva9999 wrote:Hi folks,
Is the interrupter supposed to keep the cartridges from rim locking? What has been your experience with this working, if so? Mine isn't great, even with pretty strong springs. Is there a 'cure' I can perform? Loading the clips a certain way almost always fails due to jostling during handling.
Thanks,
Aaron
Nope. The Finns came up with a modification to the magazine (the HV marked ones) that helped eliminate it. Those were on some m28/30's and some m39s. If you're loading them by hand, load them a bit forward and after pushing them down, slide them towards the rear. That'll ensure they don't get rim locked.
Re: Mag interrupter
Posted: Thu Apr 19, 2018 6:35 pm
by mogunner
If you get rimlock then your interrupter isn't working correctly. There can be several reasons for this. I've owned several that initially had a problem with the interrupter but all were easily fixed.
First off, make sure that the spring has plenty of room to move inside the stock, if the spring contacts the wood it will not move back far enough to let the next round pass by as it should.
Secondly, make sure there isn't any cosmoline in between the spring and the receiver, I've found dried cosmoline there that inhibited the spring movement.
Thirdly, inspect the spring for "adjustment bend", I've run into this on a couple, the arc of the spring was clearly not as it should be.
Fourth, check the interrupter for binding in the slot in the receiver, a burr or damage can restrict movement.
And last but not least, make sure the interrupter isn't in backwards...it can and has been done.
If you need a new spring let me know, I bought a number of them way back when I was buying a lot of Mosin's and still have quite a few.
Re: Mag interrupter
Posted: Thu Apr 19, 2018 7:06 pm
by millman
mogunner wrote:If you get rimlock then your interrupter isn't working correctly. There can be several reasons for this. I've owned several that initially had a problem with the interrupter but all were easily fixed.
First off, make sure that the spring has plenty of room to move inside the stock, if the spring contacts the wood it will not move back far enough to let the next round pass by as it should.
Secondly, make sure there isn't any cosmoline in between the spring and the receiver, I've found dried cosmoline there that inhibited the spring movement.
Thirdly, inspect the spring for "adjustment bend", I've run into this on a couple, the arc of the spring was clearly not as it should be.
Fourth, check the interrupter for binding in the slot in the receiver, a burr or damage can restrict movement.
And last but not least, make sure the interrupter isn't in backwards...it can and has been done.
If you need a new spring let me know, I bought a number of them way back when I was buying a lot of Mosin's and still have quite a few.
This!
Re: Mag interrupter
Posted: Thu Apr 19, 2018 7:43 pm
by Longcolt44
Here is a picture of the proper way to load a stripper clip.
How to load a strippr clip...Mosin.jpg
Re: Mag interrupter
Posted: Thu Apr 19, 2018 8:09 pm
by entropy
Riva9999 wrote:Hi folks,
Is the interrupter supposed to keep the cartridges from rim locking? What has been your experience with this working, if so? Mine isn't great, even with pretty strong springs. Is there a 'cure' I can perform? Loading the clips a certain way almost always fails due to jostling during handling.
Thanks,
Aaron
What the hell are you doing that causes that amount of 'jostling'? I load the the mag with the rim of each one in front the last. They don't move.
Replace your magazine springs, (there are two) and the I/E (Interruptor/Ejector) spring (there is only one). That should solve it. A one-piece I/E though expensive and hard to find (they were made up until the 30's), might be another solution.
Re: Mag interrupter
Posted: Fri Apr 20, 2018 7:36 am
by qz2026
Yeah, I always thought that the primary purpose of the interrupter just kept the next cartridge in the magazine while the top one was being chambered and to provide the force for ejection. I really think that the first thing you should do is follow the correct loading procedure as stated above.
Re: Mag interrupter
Posted: Fri Apr 20, 2018 8:17 am
by millman
qz2026 wrote:Yeah, I always thought that the primary purpose of the interrupter just kept the next cartridge in the magazine while the top one was being chambered and to provide the force for ejection. I really think that the first thing you should do is follow the correct loading procedure as stated above.
The force for ejection comes from your arm pulling the bolt back. The ejector is just a nub on the extractor that the rim of the shell hits when you pull it back. Depending on how hard you pull is how far the shell is thrown.
Re: Mag interrupter
Posted: Fri Apr 20, 2018 8:23 am
by mogunner
millman wrote:qz2026 wrote:Yeah, I always thought that the primary purpose of the interrupter just kept the next cartridge in the magazine while the top one was being chambered and to provide the force for ejection. I really think that the first thing you should do is follow the correct loading procedure as stated above.
The force for ejection comes from your arm pulling the bolt back. The ejector is just a nub on the extractor that the rim of the shell hits when you pull it back. Depending on how hard you pull is how far the shell is thrown.
You mean a nub on the interrupter, right?
Re: Mag interrupter
Posted: Fri Apr 20, 2018 8:33 am
by steelbuttplate
mogunner wrote:millman wrote:qz2026 wrote:Yeah, I always thought that the primary purpose of the interrupter just kept the next cartridge in the magazine while the top one was being chambered and to provide the force for ejection. I really think that the first thing you should do is follow the correct loading procedure as stated above.
The force for ejection comes from your arm pulling the bolt back. The ejector is just a nub on the extractor that the rim of the shell hits when you pull it back. Depending on how hard you pull is how far the shell is thrown.
You mean a nub on the interrupter, right?
Re: Mag interrupter
Posted: Fri Apr 20, 2018 8:36 am
by steelbuttplate
Interrupter yep.
As stated the biggest cause of rimlock is incorrect loading. When you get that right you may have no rimlock problem .
Re: Mag interrupter
Posted: Fri Apr 20, 2018 9:46 am
by millman
steelbuttplate wrote:mogunner wrote:millman wrote:qz2026 wrote:Yeah, I always thought that the primary purpose of the interrupter just kept the next cartridge in the magazine while the top one was being chambered and to provide the force for ejection. I really think that the first thing you should do is follow the correct loading procedure as stated above.
The force for ejection comes from your arm pulling the bolt back. The ejector is just a nub on the extractor that the rim of the shell hits when you pull it back. Depending on how hard you pull is how far the shell is thrown.
You mean a nub on the interrupter, right?
Yes, that is what I mean. Thanks for the correction.
Re: Mag interrupter
Posted: Fri Apr 20, 2018 3:38 pm
by Riva9999
Thanks all, by jostling I meant the stripper clip being knocked around during storage or carrying, even the better ones I have can sometimes have the rounds shift. If the stripper clips need to be carefully loaded because interrupters don't function when all is OK, then oh well I guess. But the repair ideas will help, thanks!
Re: Mag interrupter
Posted: Fri Apr 20, 2018 5:18 pm
by mogunner
I never loaded stripper clips any specific way. The only problem I ever ran into was with the cheap stamped stripper clips from ebay that have the little "fingers" on the end, the actual Russian ones worked perfectly for me.
Re: Mag interrupter
Posted: Fri Apr 20, 2018 10:36 pm
by entropy
Riva9999 wrote:Thanks all, by jostling I meant the stripper clip being knocked around during storage or carrying, even the better ones I have can sometimes have the rounds shift. If the stripper clips need to be carefully loaded because interrupters don't function when all is OK, then oh well I guess. But the repair ideas will help, thanks!
After replacing the mag springs and the I/E spring these tips might help;
By pulling up up the tip of the bullet of the bottom cartridge and the pushing down on the base (well as far back as you can on the case) of the top round, you force the rounds into correct position as you load them off the stripper clip. It also helps them slide down in easier.
Or you could just manually load the magazine, putting the rim of each successive round in front of the one underneath it. That will virtually guarantee no rimlock.
Re: Mag interrupter
Posted: Fri Apr 27, 2018 5:53 am
by zeebill
I have not used a Mosin stripper clip in the last 25 years other than to sell to someone else and store 5 rounds together in my range box. Generally they are made to work maybe one time and not over and over like many people try to use them. Even the more well made ones for a Mauser wear out after awhile but we make table rent sometimes selling them to people who desire to use them. When they work right they work faster than single loading each shell but there is no one firing back at me at the range so far and I see no reason to be quickly reloaded after firing at my target. I am not a soldier in the field wanting to quickly reload to keep my fire base up and my body in one piece. Do you think the soldiers in the field grabbed them off the ground to reuse them or stuffed them in the already heavy kit to reload them later? Single shell reloading usually makes for no feed problems so why invite them through using stripper clips? To each his own but it seems stupid to pay extra money to buy something that only invites trouble and costs me more money? Bill
Re: Mag interrupter
Posted: Fri Apr 27, 2018 8:49 am
by qz2026
I never use the stripper clips with Mosin's either. One thing that I have noticed is that the stripper clip guide on the Mosins vary a lot in their dimensions. The same clip will fit in one rifle but not in others. I wish the guides varied on the wider side than the narrower side... And for those that the clip fits in, it really seems to take me longer to load using the clip vs. one at a time.
Re: Mag interrupter
Posted: Sat Apr 28, 2018 11:19 am
by racerguy00
I've never had an issue with rimlock while loading with stripper clips of singly unless there was an interrupter issue. Makes no difference how the stripper is loaded.