Identifying this Mauser and the cartridge it takes

[SkullKeeper]

The bore mics roughly about 0.350 +/- at the muzzle. The magazine box length measures 3.30” internally. And that’s about all I know. I will get a chamber cast made this week but if someone can provide some insight it would be greatly appreciated.

 

[SkullKeeper]

 

[Hoofnit]

Probably 8mm or 9mm x 57, chamber cast would be the real way to identify it positively…looks a bit like an original Mauser sporter, but I suspect it’s built from parts (not original) it’s cool nonetheless

 

[SkullKeeper]

Probably 8mm or 9mm x 57, chamber cast would be the real way to identify it positively…looks a bit like an original Mauser sporter, but I suspect it’s built from parts (not original) it’s cool nonetheless

A .358 bullet will almost go in the muzzle - my thoughts are it’s a .358 something. All the receiver, bolt, and barrel numbers match so not a parts rifle but seems to be a rebore and maybe rechamber

 

[deewayne2003]

I’m no expert, but I’m putting my bet on 9x57

Basing that on bore diameter and magazine length.

 

[steve white]

Seems I remember that .358 IS 9mm? I think friends were once discussing how lucky it would be to have a 9mm bore come out exactly .358 due to bullet choices. There is a lot of variance in "9mm"

 

[SkullKeeper]

Seems I remember that .358 IS 9mm? I think friends were once discussing how lucky it would be to have a 9mm bore come out exactly .358 due to bullet choices. There is a lot of variance in "9mm”

I was thinking that 9mm is .360” … but as you say there probably is a variance

 

[mark-hunter]

It is stamped as 7.9
In my opinion this is: 7.92×57mm Mauser. (also known as 8mm Mauser, or 8x57)
Commercial designation 8x57 JS
Bullet diameter .324

 

[Huvius]

It started life as an 8mm Mauser but if it has a .350” bore then I’d think it would be rebored to something like a 35 Whelen.
The 9X57 is possible but I don’t know why anyone would choose that in a rebore.
btw, the 9X57 uses a .356” bullet but most owners just use .358s when reloading.