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Thread: Siamese Mauser

  1. #1
    Boolit Master


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    Siamese Mauser

    Went to a local small town gun show yesterday with #1 son. It's always a very small show, but what is there is interesting to a guy like me.

    One of my son's co workers, a guy about my age who I never met before had a table there, and among the things he had was what appeared to be a pristine one of these in all original condition. I've been a gun show rat all my life and can't remember seeing one that hadn't been converted in some way, usually to .45-70.

    Are these good shooters? How complicated is it to load that 8x52R cartridge?

  2. #2
    Boolit Grand Master 303Guy's Avatar
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    Apparently you can make cases out of 45/70 brass.
    I made cases out of 45/70 brass.
    https://forums.gunboards.com/showthr...se-mauser-ammo
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    I saw that, but got to thinking that brass may be easily formed from the 8x56 Hungarian which has become plentiful with the recnt imports of those rifles.

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    Yes you can make brass from 45/70 the trouble is your bore is not 8mm 323 it more to 330 bullet size. At one time I thought about reloading for my like new one. But the cost of dies and trimming down the rim to fit the bolt. It would cost more then I paid for the rifle. Another thing they made two different cases one 8x50 and 8x52. If your rear sight has been trim down then you have a 8x52. If you have a german made receiver it really rare. Most of them were made in Japan with great steel for its days. A lot of them were rebarrel to 45/70 also 303 british 7.62 Russian 348 Winchester. The best is the 45/70 you can load hot like a poor man 458 mag.

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    Oversize sn't a problem anymore. With all the Hungarian Manlicchers imported recently, Lee has seen fit to market that 205 grain .330 bullet and .329 sizers.

  6. #6
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    I just fire formed some from the 8x56 Hungarian. There was some swelling near the rim but it didn't look any worse than I have seen from a 303 British or the 7.62x54R fire in military rifles. I think I will be able to used them. I think that will be easier than using 45-70 brass.

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    Quote Originally Posted by richhodg66 View Post
    Oversize sn't a problem anymore. With all the Hungarian Manlicchers imported recently, Lee has seen fit to market that 205 grain .330 bullet and .329 sizers.
    Us sir you are correct with 330 size bullets now a days. But you still have to ask yourself is it still cheaper then you have to buy every thing to reload for it then the average cost of the rifle. Guys who have reloaded for them said 4 to 6 average groups at 100 yards. The first one I bought was like new. My plans was to build a 45/70 out of it. The more I looked at the rifle it was to nice to chop it out. Then I bought 4 complete actions. One I am planning to build a 45/70 and a 450 Alaskan and a 50 caliber Alaskan both of these cases are 348 Winchester neck up.

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    I'd rather have the 45-70 version.....but I probably wouldn't do it myself to an original.

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    Quote Originally Posted by bouncer50 View Post
    Us sir you are correct with 330 size bullets now a days. But you still have to ask yourself is it still cheaper then you have to buy every thing to reload for it then the average cost of the rifle. Guys who have reloaded for them said 4 to 6 average groups at 100 yards. The first one I bought was like new. My plans was to build a 45/70 out of it. The more I looked at the rifle it was to nice to chop it out. Then I bought 4 complete actions. One I am planning to build a 45/70 and a 450 Alaskan and a 50 caliber Alaskan both of these cases are 348 Winchester neck up.
    I already have a couple of those molds for an Oviedo Mauser in 8x57 which has a worn throat and over size bore.

    Moot point anyway, the rifle sold. Pretty cool seeing one though, never had seen an original one that I can recall.

  10. #10
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    If I remember right, used 7.62x54R brass cases to make my ammo with. it has been a number of years since I played with it. I do not remember any issues with it other than having to cast the correct diameter bullets and resizing the bullets of course. At the time I used regular unsized 8mm cast bullets. It obviously needed a little larger diameter bullets.

  11. #11
    Boolit Grand Master Texas by God's Avatar
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    I bought one in high school for $18.50 just like you saw. I read an article on them, decided not to trim down 45-70 rims and size .338 jacketed Bullets down so I had it rebarred to 30-40 Krag. It was a good strong action!

  12. #12
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    Quote Originally Posted by richhodg66 View Post
    Oversize sn't a problem anymore. With all the Hungarian Manlicchers imported recently, Lee has seen fit to market that 205 grain .330 bullet and .329 sizers.
    I think that the Hungarian's use a different cartridge than the Siamese. Some are 8x50r and others 8x52r. I was reading about them somewhere else and am trying to find the article as I ran across an original on an auction sight and was thinking of getting it for the action. Quite interesting history.
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    https://forum.cartridgecollectors.or...mmunition/7671

    Found it in my browser history. Interesting stuff
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    Quote Originally Posted by Texas by God View Post
    I bought one in high school for $18.50 just like you saw. I read an article on them, decided not to trim down 45-70 rims and size .338 jacketed Bullets down so I had it rebarred to 30-40 Krag. It was a good strong action!
    I can recall them about 20.00 bucks. Most of them had beat up stocks worn finish on the metal. But a lot of them had nice bores. So what this tells me they were carry a lot and not shot much. Back in the late 70s I bought four complete action for 25.00 bucks each. Now just for a complete bolt alone goes for over 100.00 bucks. A stripper clip about a 100.00 bucks. Really hard now to find a aftermarket wood stock. After looking at ebay for 6 month I found one. Its look like a fajen stock from about the 60s or 70s. I believe ER Shaw is the only one now who will rebarrel one for only a 45/70 now.

  15. #15
    Boolit Grand Master Texas by God's Avatar
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    The bolt face on a Siamese Mauser is a perfect fit for 3040, 303 British, and belted magnums. The magazine is sloped and tapered and built for rimmed cartridges. For a little while I had mine barreled to 6.5 Remington Magnum. It fed okay and so did the 30-40 krag but you had to be careful loading them in the magazine. I converted it back to 30-40, and sold it to a friend in South Texas where it is still killing deer.
    I used a Bishop stock on mine and fitted and finished it in the high school shop. I don't believe they would let me do that nowadays.

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  16. #16
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    Quote Originally Posted by Texas by God View Post
    The bolt face on a Siamese Mauser is a perfect fit for 3040, 303 British, and belted magnums. The magazine is sloped and tapered and built for rimmed cartridges. For a little while I had mine barreled to 6.5 Remington Magnum. It fed okay and so did the 30-40 krag but you had to be careful loading them in the magazine. I converted it back to 30-40, and sold it to a friend in South Texas where it is still killing deer.
    I used a Bishop stock on mine and fitted and finished it in the high school shop. I don't believe they would let me do that nowadays.

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    30-40 Krag or a rethreaded and re-chambered 303 British rifle barrel would be my personal choices although both require more than simply screwing a new Mauser Large Ring barrel onto the action (indexing the extractor slot I believe would be required for that rimmed case.) 30 caliber blanks are more available than .311 blanks if you go to a custom barrel route.

    That said, yes, I'd love to have one also.
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    a rethreaded 7.62x54R M-N barrel might be a pretty easy conversion also.
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  18. #18
    Boolit Grand Master Texas by God's Avatar
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    The 8x52R Siamese cartridge was pretty powerful I think, besting the 8x57 and 30-06. If I remember the article correctly. You are correct about the extractor slot, Bruce. The gunsmith charged an extra $5 to cut it on the long chambered McGowan barrel. That 30-40 went beyond.308 Win power easily in the Siamese and it would put three 180gr RN Speers into an inch often enough to say it will.

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