I’m wondering if anyone can tell me what size this shell is with EM 8 B stamped on the tag. It also says Controlled Magnetic High Impedance. I can best use a brown bullet size shell and a 707A shell next. The green bullet shell is a little too big for me. It looks like a green bullet because it’s painted green and it’s a bit tattered.(age) Thanx for any help. Hal in MI