All done with the rifle chamber casting. The cartridge length measurement shown on my crude annotation on the pink paper is not clear where the measurement starts and stops for the 68.19mm. It is from the rim where the 9.2mm diameter is to the edge of the 1st step at the 7.5mm diameter. Interesting , that little extra step before the rifling begins. I did measure that diameter as 7.24mm. see casting photo added to my cloud at

http://hutch2.tonidoid.com/app/websharepro/share/capegun/

Hutch

Last edited by shutchman; 09/29/12 03:43 PM.