.......the case in question is shown in the 1st picture. The head stamps has L C and I think that is for LAKE CITY BRASS and also 5 8...and I do not have clue what that stands for. Maybe 1958 issue? The case is .796" at the base, just a bit over 3/4" and the length is 2.990, almost 3"s. I turned the projectile as such, from Aluminum. I used a Slimline transmission and cleaned the case up as much as possible and still it shows it's age, and I like that! I hope someone can ID the case for me. Thanks and be well....Jan