ACHTUNG! 8x57JS Dynamit Nobel

[Vimy Ridge]

The stuff on the left is 150gr. I was just wondering if someone can explain the warning label for me. What is an S-Calibre barrel? Safe to shoot in K98/VZ24/M48 etc? I just want to make sure.

The stuff on the right is 236gr. I imagine it'll kick like a mule. Should I wear a helmet when I fire it?

(Both have the Actung! label)

 

[bearhunter]

S calibre is for the .323 bores and the rifles are usually marked 7.92S or JS. If your rifle is marked 7.92I it "may" have a .318 groove diameter.
The .318 diameter was the original 8mm bore size and many commercial rifles were still being procuced with it well into the 1930s and maybe even later.

Most military rifles were rebarreled to the .323 groove diameter so unless it's a mod 88 or 93/95, the chances of coming accross one are slim.

Back in my younger days, I had a lovely little 8mm sporter that I shot thousands of surplus WWII rrounds through. It had a .318 bore. Cogswell and Harrison made it. I literally shot the barrel out. Surprisingly, it shot very well, even with the throat pushed way out. I eventually had it rebarreled to 308WIN and sold it as I didn't like the recoil. Don't ask, those were unenlightened days. I should have kept it, those double set triggers were wonderful.

I'll quit rambling on now.

I have never seen

 

[Ar180shooter]

As far as I know, this stuff will be fine to shoot in a K98, they both are 7.92x57 IS (which is what the G98, K98, etc. shoot). Just don't use it in Gewehr 1888 rifles, which are chambered in 7.92x57 I (which uses slightly different bullet dimensions)

 

[Ganderite]

It is actually "IS" which is the new spitzer round, and for the new .323 barrel.

The original 8mm was .318, but they changed to a deeper groove and bullets became .323.

As said above, the .318 rifles are rare. I have a 318 sporter, made in the 20's.

 

[Vimy Ridge]

Thanks gents. Those Germans sure have funny looking I's.