I've got an old german drilling. On barrels is marked Wittener Excelsior and ,on one side Collath patent. The rifled barrel is marked only 8MM .I tryed a 8mm mauser case ,but don't fit in the chamber.Those drillings use a obsolete ammo?If yes, can be replaced with a common reloaded one?Thanks

Cristi

Ask a gunsmith to make a camber cast, it's the best way to find out

There are people who handload ammo for these calibers

Cheers
/ JOHAN

Perhaps you can find something here: www.samereier.de If Samereier doesn't have your caliber listed, you can mail him.

Regards

Frits

The 8mm range of cartridges is about the biggest in Metric calibre designations . Without some idea on case length any guess would only be a guess , and a poor one at that .

I would go with Johans suggestion on a chamber cast , or at least use a micrometer slide to try and locate the lip in the chamber for the case mouth . That will give you a pretty-near case length and then some better suggestions may be forthcoming .

Good luck , and please keep us informed .

I've measured it (not so accurate I think) and is arround 45 mm long Is not too short?

Did you take the barrel off and look underneath?

Usually the caliber and chamber lengths are stamped there for both the shotgun and rifle barrels.

I've did. is stamped only 8 M and some eagle proof marks

Cristi , can you determine if the chamber is straight sided or bottlenecked ? You should be able to slide a probe in and along and feel the end of it move in or not with the chamber walls . This will further narrow down the choices and make a final identification a little easier .

Here are two possibilities: 8x48R Sauer (Blk Powder Round). 8x42R (also BP). Along with the chamber casting, also slug the barrel to check bore size.

Hog Killer