Maverick Misfires

Ganderite

Ganderite

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Farm south of North Bay
I was testing some slugs in various 12ga shotguns. The Maverick had 50% misfires. primers are hit lightly.

The barrel was off and then re-installed. It does not look like it is possible to make a mistake with that. Did not misfire before. Now it does.

Any ideas?
 
I happen to have a Maverick here that I'm going to sell for a friend and I pulled the barrel off and reinstalled it. I don't believe it's possible to not install it correctly provided that it's seated all the way into the action, I think it would be pretty obvious if it's not.

The next question that comes to mind is have you tried the ammo in question in this gun before the barrel was removed? If you have and it worked perfectly then something has changed since the barrel was removed but if not then you have no baseline and it could be that the firing pin just doesn't strike these particular shells hard enough to detonate the primers. Have you tired a different brand of shell?
 
Although not a barrel issue, I recently had a friend come by with with one experiencing 70-100% light strikes, turned out the mainspring retaining pin had walked out a bit allowing the spring to come back just a hair more and was causing issues. Did you have the trigger group out too by chance?

was this pin on the rear,

pin1.jpg
 
No trigger out. But the kind of thing I should look at.

I sprayed brake cleaner in through the fp hole in the bold face. Maybe washing out some gunk or brass crap. Will try again in the morning.
 
Ganderite said:
Challenger shells. Most of what i use and never had a problem with them in a variety of guns. The strike is obviously light.
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Yes but did you use the same Challenger shells in this particular gun before without problems?
This is important because if they worked fine before then something has changed in the gun since you had the barrel off. If you didn't used these shells in this gun before the barrel was off then you don't know with certainty if they ever worked in this gun.
Does it have the same problem with other makes of shells?
 
Falconflyer said:
Yes but did you use the same Challenger shells in this particular gun before without problems?
This is important because if they worked fine before then something has changed in the gun since you had the barrel off. If you didn't used these shells in this gun before the barrel was off then you don't know with certainty if they ever worked in this gun.
Does it have the same problem with other makes of shells?
Click to expand...



I just got back from the range. problem is still there. Did not think to try another brand of ammo. That's a good idea.

I will step outside this afternoon and try something else. I live on a farm...

Ok, I fired a sot with a Winchester el-cheapo. Went bang on first try. Primer hit looks a bit better.

Is there a known issue with Challengers?
 
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Ganderite said:
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I just got back from the range. problem is still there. Did not think to try another brand of ammo. That's a good idea.

I will step outside this afternoon and try something else. I live on a farm...

Ok, I fired a sot with a Winchester el-cheapo. Went bang on first try. Primer hit looks a bit better.

Is there a known issue with Challengers?
Click to expand...

Well to start with, one shell doesn't tell you much accept that it went bang once. Your trying to determine if it will go bang every time. Go shoot a box of your el-cheapo winnies and if they all go bang then there's a good chance that your Challenger ammo is the problem.
 
Protrusion increase will just likely pierce primers. There is a balance between the hammer spring and the firing pin return spring. I would take a straight edge and see if there is a measureable difference in primer seating heights between the Winchester and the Challenger. I doubt there will be any. The difference will likely be rim thickness and how far into the chamber each make of round seats. Again a straight edge can measure this. That 88 should run Challenger no problem. We just have to figure out why it won't. Is this a new shotgun? You Tube has several problem videos with the 88/ 500 series shotguns and light strikes.

Darryl
 
Looks like mostly the issue is a "half #### notch" in the trigger assembly that fails and causes this. BUT that is with all types of shells. Your gun seems to not like the Challenger brand. Guys over at Mossberg Owners recommend taking the bolt apart and taking 1/2 coil and NO MORE off of the firing pin return spring to make the "balance" I mentioned earlier between the weight of the hammer spring and the weight of the firing pin return spring. Good time to thoroughly clean and de grease also. The Challengers will have Cheddite primers and they may be a little harder than the others. An over strong firing pin return spring mixed with a somewhat hard primer mixed with a cartridge with low rim thickness specs can all add up. Or it could one of each. Like I said we can work through it. BUT if it is new a warranty claim should be made. If you know anyone with a 88 to swap the bolts/trigger groups with that would be a good test too. I would assume a Mossberg 500 bolt would work also.

Darryl
 
Disassemble action completely clean trigger assembly and bolt assembly with degreeser then spray triggere assembly and bolt with g 96 or wd40 blow out with air wipe of excess reassemble and it will work fine . Internal components are dragging does not take much resistance to chane firing pin pressure
 
madtrapper143 said:
Looks like mostly the issue is a "half #### notch" in the trigger assembly that fails and causes this. BUT that is with all types of shells. Your gun seems to not like the Challenger brand. Guys over at Mossberg Owners recommend taking the bolt apart and taking 1/2 coil and NO MORE off of the firing pin return spring to make the "balance" I mentioned earlier between the weight of the hammer spring and the weight of the firing pin return spring. Good time to thoroughly clean and de grease also. The Challengers will have Cheddite primers and they may be a little harder than the others. An over strong firing pin return spring mixed with a somewhat hard primer mixed with a cartridge with low rim thickness specs can all add up. Or it could one of each. Like I said we can work through it. BUT if it is new a warranty claim should be made. If you know anyone with a 88 to swap the bolts/trigger groups with that would be a good test too. I would assume a Mossberg 500 bolt would work also.

Darryl
Click to expand...

It is new to me, bought it used.

I will measure some rim thicknesses, because that is easy to do.

Next will be the fp return spring trick. That sounds easy to do.

Thanks for the help.

Edit: I measured the rim thickness of a variety of brands. All about the same. Not a thin rim issue.
 
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Keep us posted. Before altering the return spring take heed of Struff's advice to make sure the entire bolt assembly is clean of all grease etc. It could be just some powder residue and gunk that slows the workings enough to not light off certain primer types. Driving out the retaining pin will take some effort. Often a press is better to use if you have one.


Darryl
 
I took the trigger group out. Pin was in properly. But it had a lot of brown grease in it. I rinsed it in brake cleaner. I should have put it in jar of gas and shaken it up.

It occurs to me that my shotgun was in the truck overnight before going to the range, so it was cold. That grease could be slowing down the hammer.

I did not remove the bolt, but I did wash the inside with brake cleaner. No gunk came out.

I will test it (warm) tomorrow.
 
Took the gun to the range today. It fired 100%, but some of the strikes looked very light compared to other brands of ammo.

The gun was warmer and the grease was washed out of the trigger assembly. I will wash it again and make a note not to compete in cold weather with it with Challenger ammo.
 
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