Years ago Lyman used to make a 2 piece mold where the jacket and nose were cast SEPERATELY.. You could cast the nose or 'core' from pure lead and the jacket or 'body' from #2 alloy. The same concept as being discussed here. The two were then glued together with a special epoxy sold by Lyman..l remember reading some reviews about these back in the early 80s when IHMSA and handgun hunting were popular... lt seemed the best of both worlds to me but l did not persue it..