Today I was given 2 identical copper cased rimfire rounds by someone from the club where I shoot, he had inerted them by drilling the cases. I cannot identify the calibre. There is no headstamp. The bullets are lead, and are a heeled type. The ogive is similar to the pointed end of an egg. The bullets have one grease groove. Measurements are:
Bullet dia. at mouth: 0.435" (11.04mm)
Case length: 0.630" (16mm)
Case dia. at rim: 0.438" (11.12mm)
Case dia. at mouth: 0.438" (11.12mm)
Rim thickness: 0.05" (1.34mm)
Rim dia.: 0.5" (12.66mm)
What calibre are these from the measurements? Also, information like era and manufacturer would also help if you can tell from the information.
I can post a photo if necessary.
These both have a centrefire firing pin dent in the base, it looks as if someone tried firing these in a .410 Shotgun or something similar!