Grizzly Mag FTF and FTE issues

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Chuckt5

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I picked up a Grizzly Mag 12.5" a couple of weeks ago and for the first hundred or so rounds, I had only a few FTF and FTE issues (1/10 at the most).

I took it to the range last night and I was having a feed or ejection issue ever 1/5 rounds! It also would sometimes not want to cycle at all, with the front pump being jammed in the closed position until I removed the magazine and reefed on the pump to get it to open.

Ive done a search and found a few suggestions (like bumping the top of the mag plate/filing the feed lips and grinding the lip inside the chamber BUT does anyone have any other suggestions?

I know it will take a couple of hundred more rounds till she's fully broken in, but if there are any other mods or tweaks I can do to get her running right, I would like to get it all done. Don't get me wrong, the gun is a load of fun when it's running smoothly, but I want to get it as close to 100% as possible. It's going to be a bear gun for our cabin so I need to know I can count on it under pressure. So far, not so good.

Any suggestions?

Thanks guys in advance, Chuck.
 
Not sure if this is related or not, but when field striping my shotgun, I removed the front slide (sorry, I don't know the proper names yet) that the pump is attached too. It seemed to all go back together ok, but I'm wondering if maybe I missed something?

I watched a YouTube video on taking the grizzly Mag apart/putting it back together and it seemed pretty straight forward, but I could have buggered something up in the process.

My gun didn't come with any kind of manual, so I honestly don't know.
 
Post # 250 here

Not saying it will be the answer, but a common problem with the Grizzly shotguns.

Hope this helps.
 
Mine only fails to chamber sometimes. I filed a slight chamfer on the lug on the bolt and it has been golden ever since.

I did hone my chamber on both my grizzlys before i used them as they were very rough.
 
Thanks guys for the info. I think that will really help!

One other question, when I removed the pump slide/bolt carrier assembly and also put it all back together the first time, I did NOT push the shell stop levers/springs (inside the chamber) out of the way to allow the whole thing to come apart/go back together. It just seems to go in/out no problem.

Did I bugger it all up? Could this be part of why it doesn't want to pump sometimes?
 
Chuckt5 said:
Thanks guys for the info. I think that will really help!

One other question, when I removed the pump slide/bolt carrier assembly and also put it all back together the first time, I did NOT push the shell stop levers/springs (inside the chamber) out of the way to allow the whole thing to come apart/go back together. It just seems to go in/out no problem.

Did I bugger it all up? Could this be part of why it doesn't want to pump sometimes?
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My Mag fed does not have shell latches.

The first thing my action bars hit when sliding them in is the action release.

Mine is a Norinco YJ12-2 and not a DA griz though
 
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Oh, I guess that's why it went out/in so easy then :)

I watched a Remington 80 vid and they referred to the latches, so I assumed the Grizzly Mag would have them as well.

So I don't need to worry about doing anything special when removing and reinstalling the slide/carrier assembly then other than squeezing the two slide arms so they go into the chamber?
 
Thanks.

Any ideas on why sometimes when I would try and pump/cycle the action, it would jamb up? Would that be related to the shells hanging up and if so, do you think once I do the recommended tweaks for FTF/FTE it will solve that issue as well?
 
I found on mine that I had to lightly Dremmel down the curved areas of the mags lips where they meet the top of the mag well in the receiver, as well as the groove in the front of the mag needed to be made larger for the bolt to slide back freely. Granted, that was a couple of years back and I am going from memory but that fixed the mags to perfect. Also remember if you have to take down any spots go slow and use the 3" shells as your guide as getting them to feed with 2 3/4" won't necessarly fix the issue when you try and cycle 3". In my case, the feeding issue had nothing to do with the chamber. Good luck.

Oh yes, and shine a strong flashlight through the ejector to see where those lips are lining up inside. If it is the same issue, this will show you where to take areas down, and not take too much off or at the wrong location.
 
I worked on the gun this afternoon and it is feeding and ejecting dummy rounds VERY smoothly!

Now I need to get out to the range and confirm all is just as smooth with live rounds.

Thanks again guys, Chuck.
 
Good to hear let us know how it works out at the range and post the issues/solutions you had it may help someone else down the road.....

Chuckt5 said:
I worked on the gun this afternoon and it is feeding and ejecting dummy rounds VERY smoothly!

Now I need to get out to the range and confirm all is just as smooth with live rounds.

Thanks again guys, Chuck.
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I ended up filing the outside edges of the magazines top lips at the front where it was being scoured by something in the chamber as the action was cycled. I then also filed in upper inside of the tops of the magazines where the shells come up and out into the chamber. I took out the magazine followers and dented the fronts to encourage the rounds to tilt up and into the chamber from the magazine.

I also removed the barrel and sanded down the rough surfaces inside the chamber as shown in the posts referred to earlier in this thread. I then filled down the rough edge at the top and bottom of the chamber where it meets the barrel. Then I smoothed everything out again with sandpaper.

Once this was all done, I cleaned and lubed the gun, then cycled the action and could tell right away things were much better. From there I loaded a couple of magazines with dummy rounds and cycled the action again, this time feeding the dummy rounds in and out if the chamber from the magazines which again was much smoother.

The final test will be of course at the range with live rounds, but so far it's a huge improvement.
 
Chuckt5 said:
I ended up filing the outside edges of the magazines top lips at the front where it was being scoured by something in the chamber as the action was cycled. I then also filed in upper inside of the tops of the magazines where the shells come up and out into the chamber. I took out the magazine followers and dented the fronts to encourage the rounds to tilt up and into the chamber from the magazine.

I also removed the barrel and sanded down the rough surfaces inside the chamber as shown in the posts referred to earlier in this thread. I then filled down the rough edge at the top and bottom of the chamber where it meets the barrel. Then I smoothed everything out again with sandpaper.

Once this was all done, I cleaned and lubed the gun, then cycled the action and could tell right away things were much better. From there I loaded a couple of magazines with dummy rounds and cycled the action again, this time feeding the dummy rounds in and out if the chamber from the magazines which again was much smoother.

The final test will be of course at the range with live rounds, but so far it's a huge improvement.
Click to expand...

Very nice, good to hear you got it figured out. You reminded me that the follower needed the raised 'dent" on mine as well, that made a much better feed angle. Good luck at the range, looks like you got it sorted out.
 
Finally got her out the the range and all started out well without and any FTF or FTE issues. After maybe running 20 rounds through her she then started having issues again!

The shell would get hung up going into the chamber. They would be angled up from the magazine and unable to enter the chamber due to the extreme angle. Then after sorting all that out she didn't want to eject some of the fired rounds. They would be partly jammed in the chamber, hung up and prevented from ejecting.

Any ideas on what wrong here?

I'm thinking maybe a burr on the bottom of the chamber that's hanging up the rounds going in and out?

I also read some guys have polished the top of the round follower. Is this what the round sits on in the magazine? I'm not sure what exactly the follower is.
 
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