8x57 out of a 7.92pr Spanish mauser

Discussion in 'Ammunition & Reloading' started by cva209x50, Mar 22, 2014.

  1. cva209x50

    cva209x50 New Member

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    I am trying to find some ammo for a Spanish Mauser (its either a m43 or a m48). On the side of the receiver it says 7.92 [p][r]. It also says R-1858 on it. I measured the bore at .3118. I will eventually handload for it. As for factory ammo, which 8x57 variants can I use out of this rifle?
     

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  2. robocop10mm

    robocop10mm Lifetime Supporting Member Lifetime Supporter

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    The "proper" name of the 8mm Mauser cartridge is 7.92 X 57. 8mm is the correct ammo for that rifle
     

  3. c3shooter

    c3shooter Administrator Staff Member

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    Yep- what he said.
     
  4. cva209x50

    cva209x50 New Member

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    Can I shoot modern 8mm Mauser ammo out of it or do I need to stick with rimmed surplus?
     
  5. jpattersonnh

    jpattersonnh Active Member

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    All 8x57 is rimless.
     
  6. robocop10mm

    robocop10mm Lifetime Supporting Member Lifetime Supporter

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    Except for the 8 X 57 rimmed. But no, the modern rimless ammo is correct
     
  7. 303tom

    303tom Well-Known Member

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    Listen to these guy, most of em know what the heck their talking about !................
    http://en.wikipedia.org/wiki/7.92x57mm_Mauser
    http://en.wikipedia.org/wiki/Zastava_M48
     
  8. JonM

    JonM Moderator

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    Just blindly stuffing in ammo on a modified war rifle of any sort based on its markings is damn dangerous. Doing it ignores the history of imports and what happened to them. A LOT of these were either rechambered or rethoated for other rounds never available to mausers. You NEED to chamber cast any old mauser to find out what it really is.

    The rule of mausers and any war gun that's had "gunsmithing" done EVEN if grandpappy says I been shootin it for years with this ammo... is cast the chamber. Every single old grandpappy and best friend's uncle bob or the guy the mailman knows for 40 years who has been shooting handloads for a century he gets from some bearded old guru in a mountain is a liar. Chamber cast old war guns.
     
  9. cva209x50

    cva209x50 New Member

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    I bought a box of Remington cor-lokt 8mm Mauser at gander mountain last weekend. I went to the range yesterday to test the m43 Mauser. It shot the .318 diameter cor-lokt ammo just fine. It's loud as heck. It doesn't kick worth crap. In my opinion, my m44 kicks harder than the Mauser. http://m.youtube.com/#/watch?v=kbY-Lead2KE
     
  10. gschnarr

    gschnarr New Member

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    The remington 8 Mauser round is under loaded. It is in the 30-30 range. Because of concerns about the possibility of someone shooting the round in an early mauser that has a .318 bore rather than the .323, American manufactures under load the round. European ammo is loaded to full power.
     
  11. 303tom

    303tom Well-Known Member

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    Wrong !..............
     
  12. 303tom

    303tom Well-Known Member

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    7.92×57mm Mauser; ie 8.08 mm / .318 (I and IR) and the rimmed 8×57mm IRS cartridges; ie 8.20 / .323" (IS and IRS) are not the same & can NO way be fired in the same rifle !.............
     
  13. cva209x50

    cva209x50 New Member

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    Is 8x57 surplus ammo .318 or .323?
     
  14. 303tom

    303tom Well-Known Member

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    Last edited: Mar 31, 2014
  15. 303tom

    303tom Well-Known Member

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    Here is a better way to explain it !..............

    8X57JR Mauser
    Introduced: 1900
    8mm Mauser case W/rim
    Twist: 8.5"
    Made expecially for combination guns such as Drilling
    8X57JRS mauser
    Introduced: 1905
    Rimmed 8X57 Mauser case
    with "S"
    bullet. (Spitzer)
    Twist: 8.5"
    Rimless Necked:
    Dia: Rim: .473"
    Shoulder: .431"
    Mouth: .3493"
    Bullet: .3230"
    Length:
    Base to Shoulder: 1.8273"
    Case: 2.240
    Overall: 3.250"
    GERMAN 8mm (7.92mm) CARTRIDGE:
    Introduced: 1888
    OTHER Names: 8X57mm
    7.92mm Mauser
    7.9mm
    8X57mmJS
    8mm Mauser
    Type: Rimmless, necked CF
    Length: 2.765"
    Wt: 378gr
    Powder: Nitrocellulose
    Primer: Boxer (Lg rifle)
    BULLET:
    Type: Soft Point
    Dia: .321" Thru 1904
    .0323 Aft 1904 S or JS
    Wt: 170gr
    Length: .915"
    Dia Rim: .473"
    base: .470"
    neck: .351"
    Mouth: .3493"
    Shoulder: .4314"
    Base to Shoulder: 1.8273"
    Case: 2.240"
    Overall: 3.250"
    Muzzle velocity: 2530 f.s.
    pressure: 47000lb sq.in.
    Note: Curent ammunition is this caliber is not recommended for this model, as the chamber pressure exceeds 47000 lb
    Sq.in.
    Factory Ballistics:
    Bullet: MV: ME:
    123gr 2887 2277
    159gr 2723 2618
    196gr 2526 2778
    198gr 2625 3031
    200gr 2320 2390
    227gr 2330 2737

    The 8mm Mauser is one of the world's truly great military cartridges. It was the official German military caliber in both world wars and was also adopted by Czechoslovakia, Poland and other countries. It is also a popular sporting round in many parts of the world. Although designated the 8mm Mauser, the original military round was designed for the German Model 88 infantry rifle,
    which was a modified Mannlicher-type not a Mauser design.

    This rifle is known officially as the Gewehr (Rifle), or German Infantry Model 1888. It was designed by the German Infantry Board of Commission at Spandau Arsenal. It was
    replaced in 1898 by the superior Mauser Model of that year. The original 8 (7.92)mm cartridge used a round-nosed, 226 grain bullet of .318: diameter. Muzzle velocity was 2093fps. In 1905, the Germans adopted an improved cartridge that retained the original 8X57mm case, but employed a larger diameter bullet of .323". The new bullet was lighter at 154 grains and was of pointed, or spitzer-type. Muzzle velocity was upped to 2880 fps. All German military rifles manufactured since 1905 have the .323" bore.

    The German 8mm military cartridge is designated by a "J" for "Infanterie" (The J & I are interchangeable) The late .323" bore or caliber is indicated by an "S" for Spitzer-type.
    Sporting ammunition in 8mm is labeled by the same system. The 8X57J or 1888 cartridge can be fired safely in the 1905 or "S" Bore, though accuracy is poor. However it is not safe
    to fire the larger "S" (.323") bullet in the smaller "J" (.318" bore.

    WARNING! Many J bore (.318") rifles still exist and will fire S bore (.323") cartridges, creating dangerous pressures.
     
  16. cva209x50

    cva209x50 New Member

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    I can't find my calipers so I measured the bore diameter with a tape measure 5 times (to compensate for lack of precision). It came out to between 5.125/16"-5.5/16". That converts to .320"-.326". Considering I used a 1/16" tape measure, does that sound about right for a large ring Mauser?
     
  17. Axxe55

    Axxe55 The Apocalypse Is Coming.....

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    you can't accurately measure the bore of a rifle with a tape measure. you need to measure the lands and grooves and the proper way is to slug the barrel and then measure the slug with micrometer.

    there is no way you can discern the difference between .323 and .318 with a tape measure. that's only .005 difference.
     
  18. JTJ

    JTJ Well-Known Member Supporter

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    A long time ago I picked up a sporterized 98 Mauser. The 1st thing I did was take it to a gun smith to check the camber and bore. The chamber was also checked with go-no go gauges. Dont trust any modified military rifles. A lot of them were modified to wildcats like the 8mm06 which was popular at the time. Some of them were really butchered.
     
  19. jpattersonnh

    jpattersonnh Active Member

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    It is ok to be safe, but really? The info that is posted as "fact" is not quite correct.
    The '88 Commision rifle was a .318, but ones stamped w/ an "s" are rebarreled for moderate modern ammo such as American made. The 1895 was originally .318, but was rebarreled/rebored by Germany, Turkey, S. American countries and Spain to .323. In 1898, all Military rifles were made in .323. What the OP has is a K98k w/ a sporter stock. The Bolt, rear sight, front sight, even the trigger guard are K98. OP, Send me a PM. I can give you more info. I can also send you some ammo that will make you "feel" the recoil.