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1891 Argentine Mauser 7.62x39 Conversion

Posted By: KC

1891 Argentine Mauser 7.62x39 Conversion - 10/26/15 04:38 AM

My granddad bought this rifle in the 50's and put a decent amount of money into it. Had the barrel cut and crowned, a walnut stock made, and put a Weaver k4 in Redfield rings. Only downside is ammo, and although I do reload, I don't like the idea of forming brass. Inspiration struck flipping through a reloading manual. I contacted Ace Dube with MCA Sports and he made a chamber adapter for me. I'm waiting on it, should be here in a day or three. The biggest issue is getting it to feed correctly. To that end, I broke out the tools...

We're dealing with a cartridge 14 mm shorter, so clearly it's going to nose dive in the mag.



So I scrounged some poly material, like cutting boards are made of, from my buddy who owns a glass shop. Three hours, two skinned knuckles, and a whole lot of sanding the rifle feeds like your aunt at a catfish buffet...



Had to snip the follower about 1/4" to make room for the mag block.








And the final product- 1/16 under the feed ramp with 40 ish degree angle.

Posted By: kmon11

Re: 1891 Argentine Mauser 7.62x39 Conversion - 10/26/15 11:59 AM

Interesting way to put the old Argentine back into service. Let us know how it works when you get the adaptor.
Posted By: KC

Re: 1891 Argentine Mauser 7.62x39 Conversion - 10/26/15 03:45 PM

It used to be offered as a stock item from one of the big parts houses, Numrich maybe. The only issue I've read is extraction can sometimes be iffy, the 7.65 is .47- and the 7.62 is .447 across the rim. My bolt grabs and holds them pretty well, so I hope I'm one of the lucky ones.
Posted By: Ranch Dog

Re: 1891 Argentine Mauser 7.62x39 Conversion - 10/26/15 10:15 PM

Good work!

I own a Mini-Mauser & Savage 10FCM Scout chambered in the 7.62x39. I think it is a pretty good whitetail & hog cartridge.
Posted By: thedoveshooter

Re: 1891 Argentine Mauser 7.62x39 Conversion - 10/26/15 11:18 PM

Those 1891s are good shooters. I love shooting mine. Almost feels like shooting a musket without the black powder smoke and with much better accuracy!
Posted By: 10ring

Re: 1891 Argentine Mauser 7.62x39 Conversion - 10/28/15 04:25 AM

Please keep us posted on the final product as you complete this and the chamber adapter is installed. I'm very interested in doing the same thing to an Argentine I have!
Posted By: KC

Re: 1891 Argentine Mauser 7.62x39 Conversion - 10/29/15 01:13 AM

Received the adapter today, have to order some loctite black max to install it.
Posted By: KC

Re: 1891 Argentine Mauser 7.62x39 Conversion - 10/31/15 03:45 AM

Installed the adapter. It was a bit tricky trying to apply the Black Max, keep it from running, getting it in the camber without smearing the adhesive everywhere, etc. It's in there, thankfully I had the foresight to put some no stickum on the bolt face and lug races. Moral of the story, Black Max is some NASTY stuff.

Gonna have to dry up a bit before I can shoot it.
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