I have no Pope barreled rifles that are in high velocity cartridges, so never even considered jacketed bullets in mine. Nothing but cast lead, and my highest velocities with smokeless powders are all under 1500 fps. But I shoot all my old rifles no matter which famous maker's barrels are on them. I have Pope, Schoyen, Peterson, Hubalek, Zettler, Bremer, etc., and love shooting them all.