Neither the original poster nor anyone else brought up cast lead bullets before you did but I'll answer your question anyway: finding good accurate home cast .22 rifle loads is about the most challenging reloading project a retired fellow can fill his time with. Like making your own bullet lube or gas checks the pennies you save are not as important as enjoying your hobby time. Another way to look at it is finding a relatively high velocity accurate cast .223 load is less expensive than buying an antique rifle that you have to modify brass for.