If I'm remembering correctly, someone put a thread on here a year or so ago that gave the measurements that you could get from the various cartridge cases - it was quite an extensive list as I remember. i.e. not just a few common cartridges but included just about anything you might run across that you could utilize for a measure. I don't remember who posted the chart but it was in response to a question similar to the OP's. Anyone remember the post and possibly what the title was so the link could be posted on this thread?
If a pair of '51 Navies were good enough for Billy Hickok, then a single Navy on my right hip is good enough for me . . . besides . . . I'm probably only half as good as he was anyways. Hiram's Rangers Badge #63