I’m a first time poster and am requesting some assistance in identifying this cartridge case. My neighbor found it on the grounds of the old Camp Grant (1917-1946) here in Rockford, Illinois. She asked me to identify it and I have a guess but I’m not knowledgeable enough to give her a definitive answer. So here I am, hat in hand, asking for assistance.
When I first laid eyes on it, my immediate guess was 30-06. After measuring the case and spending a couple of hours doing some research on the net, I’m a little confused. The case measurements are close to those of a 30-06 but are off by several thousandths.
Measurements of this case:
Case Length - 2.485"
Neck Diameter - 0.330"
Case Diameter - 0.456"
Rim Diameter - 0.466"
Rim Thickness - 0.050"
Head Stamp - U.S.C.Co, two stars, the number 18
I want to know:
1.) Is this 30-06? If not, what is it? If it is, why are the dimensions so much different than what is posted on the web for a 30-06?
2.) I know U.S.C.Co is U.S. Cartridge Co. but what is the 18? Is that the year the cartridge was mfg. or does it denote something else?
3.) Is there anything else I should know about this cartridge case?
Thank you all in advance for sharing your knowledge.
Forged on the anvil of discipline.
The Few. The Proud.