I receently acquired a W. Collath Drilling. THe rifle is nominally bored 10.75mm. However, for a variety of reasons, I am unable to cast the chamber. The rifling starts 57mm from the face of the breech. I'm thinking that it mught be a 10.75x55R. I was wondering if anyone here had a 10.75x55R, and could provide some measurements. Specifically; rim diameter, head diameter and neck ID and OD. A picture would be peachy.

Thanks,
Paul

There is a 10.75 x 52R and the next rimmed cartridge is the 10.75 x 57R. Its late or I would drag out the appropriate book and scan some pages for you . Will so do in the morning .

Just to update - I scanned the relevant pages and sent them direct to gitano - havent got the hang of posting pictures on here yet ....