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Forum Index > Rifles general discussion > Mossberg Patriot rifle

Mossberg Patriot rifle

31 Jan 2016
@ 09:03 pm (GMT)

Nathan Foster

From email:

Hello Nathan,

I am currently in a gunsmith school and we are going over accuracy and our course material has your publication as well as your YouTube videos linked. I am thinking about bedding my rifle and i know since it is a synthetic stock to stabilize it first. I watched your videos countless time but i am unsure on how to bed my rifle due to the magazine guide which is part number 31 in illustration the magazine guide is indeed thin cheap plastic.I just need to know how to prep it the right way. I attached a picture of mossbergs blown out view on the patriot. I understand you are terribly busy any help would be greatly appreciated!!

Kindest Regards, .....



Reply:

Hi ..., looks like Mossberg have completely screwed people over with this budget rifle design. It is most definitely a one of a kind and a very bad one of a kind at that. There is nothing patriotic about this rifle whatsoever.

The main problems I see, are that even if you get the rifle bedded successfully, the magazine assembly is bolted directly to the action and then the stock. This means that the entire system will be under various stresses. Second to this are the potential problems of metal to metal contact and the ensuing vibrations that this may cause.

Now, going back to your course material, you will note that I have discussed the glue and screw method. This is the route that you may need to take in order to alleviate problems with harmonics.

You can use stock stabilizer in the forend but if there is a weak point between the stabilized area at the action area, this may serve as a flex point. In either case, make sure that you stabilize any skeletal areas of the action so that the action area of the stock is filled like the forend, then set about the job as described in the Accurizing and Maintenance book / course material.

I also suggest that as soon as you get this rifle shooting, you sell it. I cannot stand it when a gun company attempts to bend me over and serve me from behind and suggest you also take pride in your hobby and do not fall for the same. Next time around, try to obtain a basic M700 or clone or perhaps a Howa / WBY Vanguard or Win M70 to cut your teeth on.

Replies

1
31 Jan 2016
@ 09:43 pm (GMT)

Nathan Foster

Re: Mossberg Patriot rifle
Note to other readers, it also pays to be wary of pin 14 in this rifle and also the Omark target rifles. The pin is not solid as it has to accommodate the firing pin passing through it. Always keep an eye on the bolt head and this pin assembly (more so as the rifle gains age and wear). If the pin shears, the bolt handle can be turned down but without engaging the locking lugs.

If making a new pin, it is possible to turn from soft mild steel, then case harden the outer in Casenit. Do not use a tool steel or any other hard / brittle core material. The steel must be tough but not brittle.
01 Feb 2016
@ 03:12 am (GMT)

Thomas Kitchen

Re: Mossberg Patriot rifle
thank you for sharing another email Nathan they really do make for interesting reading.
you really do have to wonder what manufactures are thinking some times.
01 Feb 2016
@ 03:37 am (GMT)

Nathan Foster

Re: Mossberg Patriot rifle
Thanks Thomas, much appreciated.
01 Feb 2016
@ 03:38 am (GMT)

Nathan Foster

Re: Mossberg Patriot rifle
FYI, the person who emailed me is now going to move to another rifle design and start over.
02 Feb 2016
@ 05:47 am (GMT)

Paul Leverman

Re: Mossberg Patriot rifle
Nathan - in regards to the pin 14: this looks very similar to the Savage set-up, but I may be looking at it wrong. Is the failure common to Savages as well? There seem to be some design differences, but this drawing isn't really all that great.
04 Feb 2016
@ 03:10 am (GMT)

Nathan Foster

Re: Mossberg Patriot rifle
Common is not the right word really. It is perhaps not fully a design flaw either.

In any rifle with a cross pin, you simply have to keep an eye on wear. A good example would be any target rifle running neck sized loads that take some cranking on the bolt handle, both in and out. A few barrels later and the pin may be worn, especially if it is narrow where it has been drilled through.

The pin on the Savage is quite large and this is not a common issue that I know of.

Not fully a rifle fault but more a factor of how we use them, how much we use them, how hard we use them.

I hope I am making sense. Yes, solid construction is ideal. But then nobody wants to pay such machining costs so these are the compromises.
08 Feb 2016
@ 04:05 pm (GMT)

Paul Leverman

Re: Mossberg Patriot rifle
After reading your note on the cross-pin, I stripped my Savage bolts and had a very close look at the pins. None had any signs of wear that I could see. The bearing surface on the bolt/pin were clean. The through hole had no signs of damage. But further to this, I started looking at the construction and found myself wondering why these pins would fail in the first place. Theoretically, there should be no forces applied to them when the gun is fired. All the force of the recoil should be transferred directly to the locking lugs. However, if your lugs are not lapped, or at least have a solid mating with their respective grooves in the action, then yes, that pin would be exposed to all sorts of forces that it was not meant to handle. If only one lug was in contact, the uneven loading of the bearing surfaces could definitely end with a failure.

This is just an observation on my part, as I am definitely NOT an engineer. My Savages (3) have all seen more than their share of rounds. But, as part of the cleaning/pre-range regimen, I lap the lugs to about 80% or more if I can get it.
08 Feb 2016
@ 04:56 pm (GMT)

Paul Leverman

Re: Mossberg Patriot rifle
Still wondering about that pin. Looking at it again, I see where you are coming from, Nathan. The torque applied when either jamming (camming) a tight round in, or hammering a bolt open would definitely not do that pin any good. So, between recoil and operator abuse, that poor little pin is in a pretty hostile setting. It's a testament to the companies that more don't fail.
09 Feb 2016
@ 06:58 am (GMT)

Thomas Kitchen

Re: Mossberg Patriot rifle
i was looking into this and it appears the mossberg mvp rifles are the same design so be aware of similar issues
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