Are 3" chambered 20b shotguns safe/strong enough to shoot HV steel cartridges. With adepted chokes ofcourse. Is there any gunsmith on here who could give an answer ? We must shoot non-toxic shot in all circumstances ( Flemish law) , so steel is the only practical and affordable answer. We mostly shoot low pressure cartridges, but as 3" guns have magnum proof I just ask myself the question if they are safe with high pressure steel cartridges.