I have a side-line interest in copper-cased rimed and inside-primed cartridges from the Civil War era and early Western era. I just got a few cartridges and some of them are Benet primed. Does anyone know who-all produced the Benet primed cartridges? One in particular is a 45 Colt. There’s a ring around the bottom but no head stamp. Any idea who may have produced it?