Mauser 8mm

[taxman]

Does anyone have info regarding the Mauser 8mm J vs JS series? I read in the Nosler reloading book that there are actully two calibers. One in .323 and one in .318. Supposedly one is the J series and the other JS. Any experience on how to recognize them?
Thanks

 

[Moparmike]

Wouldnt know how to recognize them, but as an owner of an 8mm I can tell you that any 8mm made after 1900 will almost certainly be .323. .318 hasnt been used widely (and not in a military use AFAIK) since before 1900.

If you are getting surplus, I would bet my next paycheck that it is .323.

 

[taxman]

Thanks for the reply.
My brother purchased one through the CMP and when shooting it acts like it is producing excess pressure. Bolt is very difficult to open. Is there any way to tell when it was manufacutred?

 

[Dave Markowitz]

Purchased an 8mm through the CMP???? Are you sure?

The CMP sells US service rifles, none of which were chambered for 8mm.

 

[Jim K]

Taxman,

PLEASE tell us your brother is not firing 8mm through a Model 1903 Springfield or Model 1917 Enfield. If he is, the pressure certainly is high, and tell him to get the proper .30-'06 ammunition NOW! BEFORE SOMETHING VERY BAD HAPPENS!

Jim

 

[Gewehr98]

Holy Cow!



I've always heard stories of people doing this, but... EGAD!

 

[Freightman]

Lucky he hasn't become a dead man

 

[SMLE]

"J" is the .318" "JS" is the .323". Older rifles that were made for the .318" and were converted for the .323" will have a large and prominent "S"
stamped on the receiver.

If you're feeding a rifle built on an 1898 action it will be the .323".

US rifles are .308". Anybody firing 8mm in a 30-06 is playing with their life! Stop it at once!!!