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Shooting & Reloading - Mausers, Big Bores and others >> Mauser Discussion Forum
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doubleriflejack
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Reged: 11/11/07
Posts: 352
Loc: Oregon, U.S.A.
Do you own an 8x57jr & are familiar with its use in doubles
      #168467 - 26/09/10 04:20 AM

If you are familiar with the 8x57jr MAUSER (.318 dia. version) and especially if you are familiar with its use in German double rifles, see my post under double rifles, for I am trying to determine if most double rifles in this caliber were regulated with heavier or lighter weight bullets in this rimmed caliber?

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rigbymauser
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Reged: 15/05/05
Posts: 1970
Loc: Denmark
Re: Do you own an 8x57jr & are familiar with its use in doubles [Re: doubleriflejack]
      #168469 - 26/09/10 04:37 AM


Well... I understand why you ask becauser sooo much old ammo is out there in all different styles, weight especially in 8x57 with or without rim . However I can tell you this much as I have been collecting old ammunition for both my mausers for years in the "S .323cal" & "Normal ,318" and ofcouse I have incountered much over the years in both rimmed and rimless. The absolutly most commen found ammo is without a doubt the 8x57 198grain bullet for both rimmed and rimless. I have a few boxes for the 14.7gram( 227grain) from DWM and 226grain from Kynochs. I have only a few rimmed 8x57 loose rounds with 227grain bullets. I have never seen a Kynoch box with rimmed 8x57..they might be there somewhere, but they most be rare. So seen from that point of view, I could presume that most doublerifle ammo used to regulate doublerifles in was for the 198grain.

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Kiwi_bloke
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Reged: 03/09/09
Posts: 256
Loc: New Zealand
Re: Do you own an 8x57jr & are familiar with its use in doubles [Re: rigbymauser]
      #169525 - 14/10/10 08:16 PM

The double rifle you refered to elsewhere is (perhaps) a .318" Westley Richards, and the .318JR Mauser you refer to above is, I'm sure you already understand, a different cartridge.

If the rifle is German made and proved in Germany between 1912 and 1939 it will be marked something like this, "St.m.G 15g". This means Stahl Mantel Geschoss (stell jacket bullet). The bullet weight shown in grams can be multiplied by 15.47 to get the grain weight, in this example (on my 1924 Drilling), it's a 231 grain bullet.

The early military .318" bullet was 14,6g or 226 grains.
The sporting RWS H-Mantle bullet was, by comparison, 244 grains.
The standard .318" sporting bullet was 12,70 grams or 196 grains.

If there are European proof marks on this rifle that don't match these examples, that you need help with, post a picture and I'll do my best to help. A chamber cast would also be a very good idea, easy to do and should not harm the gun.

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Kiwi_bloke
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Reged: 03/09/09
Posts: 256
Loc: New Zealand
Re: Do you own an 8x57jr & are familiar with its use in doubles [Re: Kiwi_bloke]
      #169528 - 14/10/10 08:43 PM

I just had a look at George Nonte's Home Guide to Cartridge Conversions. This states that the .318" Rimless Nitro Express (a.k.a. .318" Westley Richards Acclerated Express), can be formed from a .30-06 case; first trim to 2.38"; then run into a 8x56 Mannlicher Schoenauer FL die until the bolt will close. Then expand the neck to hold .330" bullets.

This reminds me that the .318" WR actually does not use .318" bullets. This is the bore size. Nonte records that the .318" WR had a rim and head diameter both of .465" and a neck diameter of .358". It used 250 grain bullets at 2,400 fps muzzle velocity.

If you're interested in 8x57JR, JC Munnell wrote in Precision Shooter, November 2005 about "Some Other Eight Millimeter European Sporting Rounds". This gives favoured loads and bullets for Drillings and doubles. Also he wrote "Sorting Through (Some of) The 8x57 Cartridges", in Precision Shooter, July 2005. He seems to have used only 196 grain (DWM, Norma, S&B and RWS) bullets in his Scherell double rifle, (8x57JR), and both 196 and 225 grain in his Krieghoff Drilling, which was also 8x57JR.

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