12.7x41mm Mosin Nagant

[Gamecock24]

12.7x41mm Mosin

So I was cleaning my guns one day and had some bullets, 7.62x54r & .500sw, sitting the table next to each other and I noticed a similarity.

They are the same size at the rim. So I tried the .500 in the Mosin bolt.

It fit! With no modification. So I grabbed a stripped 91/30 barreled action I had lying around but the big bullets wouldn't fit in the mag or through the bottom of the receiver. First I stretched out the walls of the mag.
And the bullets fit.

Next since I don't have a milling machine I used my dremel to open up the bottom of the receiver.

And it's able to feed .500 magnum. This is beginning of .500S&W Mosin or as like to call it 12.7x41mm.

 

[PANZER22]

I hope you are going to attach it to a tree and pull the trigger with a 50 yard string to test it :mrgreen:

 

[Gamecock24]

Now I needed a barrel and I found one from Green Moutain Barrels for $100. So I ordered one and sent it to my buddy in NY that did the machining on my other custom Mosin. He threaded and chambered it for me once the reamer showed up.

Then cut a crown in the barrel for.

While he was waiting on the reamer and working on the barrel I decided to make my own Trigger out of solid brass. After much cutting and grinding here's what I came up with along with a brass bolt handle.

 

[Gamecock24]

Here's the rest
As for the tree it will be strapped to I got a walnut stock off eBay.

To match the other brass I made a plate for the butt plate where I'll probably end up with a recoil pad.

Well back to what my gunsmith was doing. He mated the barrel to the receiver.


He also test fired it and sent me a video. Y'all should like this.

http://youtu.be/0RPqbzwITIQ

Now I just have to wait on him to send it back to me so I can do some blueing and fitting that big barrel into the stock.

I'll be updating this thread as I make more progress. I didn't want to start a thread until I was sure this thing wasn't going to blow up.

 

[Midnight Raver]

Wow, that is going to be something else! Going with iron sights or optics? :ugeek:

 

[Gamecock24]

I've got a Vortex Strike red dot to put on it but I want to iron sights on it too. But it will be the red dot for now on a JMECK see through scope mount.

 

[Midnight Raver]

Ah, I see- that sounds like a cool setup!

 

[PapaBear]

What a cool project. Thanks for sharing

 

[Joker]

Outstanding

 

[Dave29461]

Thanks for making us take another look at the fun of thinking outside the box. Great project.

Dave

 

[Gamecock24]

Ok I've got this thing put together finally. I haven't uploaded to photobucket yet so no pics but here's a video.
http://youtu.be/sQZK6kFAKC8

 

[PapaBear]

I see in the comments on the video that the stock cracked? That's unfortunate.


How bad is the crack?

 

[Gamecock24]

It's not too bad but I can't find the piece that broke off. I thought I put in the case

Here's some pictures

 

[Midnight Raver]

Hmm, same place as the stock on my Ruger 10/22 broke over 30 years ago! That sucks, but at least it wasn't some kind of major cracking involved. What a rifle!

 

[PapaBear]

Man what a great project, and to be realized. Awesome. Hope you figure out the stock issue.