The issue is curable in some old guns by polishing the chambers. The brass washed steel heads give some guns fits, but it's not limited to old guns. A modern 870 12 that I own won't cycle Remington promos but will cycle Winchester cheapies. Figure that one out. My M12 16 won't cycle the Herter purples but digests all others. On an Ithaca M37 16, the cure was having Les Diamond re-cut the extractor notches on the barrel which helped the extractors line up and grip the rims better. Solid brass heads were more forgiving. The move to steel heads has been a game changer. Gil
