I just saw an old episode of "Sin & Secrets" where they went over the case of the death of Gerald "Cody" Boyd by Kathy Denson in 2002. Apparently she used an "antique" .44 caliber BP revolver to kill him. I don't know if it was really an original or not, used in the killing, but the show used a Colt 1860 Army as the prop. I thought it interesting that someone was purposely killed/murdered with a BP revolver and wondered if this was possibly the last time it happened.