Another update - chamber information. (this keeps getting weirder)
So the current theory is that the cartridge is approximately .300 / 8mm based on the proof marks. It was also marked either 58 or 68 under that proof making some believe that was the cartridge's length. 68mm = 1.72", 58mm=1.473". Neither really match up to the information I've received from the measurements taken with a dial caliper.
Based on measurements of the chamber:
The cartridge's rim is .500"
The base of the cartidge after the rim is about .434" wide.
5/8" into the chamber, the cartridge is about .415" wide.
At 2.3" into the chamber, there is a constriction that is either a really tiny shoulder or it is the lams, I can't tell.
The bore at muzzle is measuring .316 to .325 depending how I measure but this is a fuzzy number.
What kind of cartridge existed in 1911 that was rimmed, about 2.3" long (or longer) and had a tapered description such as this? Upon further review there is no taper/shoulder or reduced neck on this cartridge at all. It is a straight walled cartridge that gradually tapers down to the bore size. I've yet to find a metric cartridge that was built like this during that period of history.
Last edited by Rookhawk; 07/08/10 06:50 PM.
