"Didn't Lee Harvey Oswald get caught with one of these? Everyone knows about the infamous Carcano, but the cut-down Victory Model he used to kill that cop is often overlooked. "

He did, the revolver which LHO allegedly used to shoot officer J. D. Tippitt was a cut-down BSR. There are several JFK assassination websites which cover the event and the gun thoroughly. There is also information about the gun in the Warren Report including a bit of a mystery about the ammunition used in it which was never explained very well.