The .219 AI Zipper is a near ballistic clone of the .225 Winchester and reloading data for the .225 can be used for it, although I'd limit myself to loads below max, particularly in some of the less strong actions like the Winchester and Marlin lever actions and the Martini Cadet. There is also some concern that .30-30 or .25-35 brass isn't as strong as that of the .225, although I've never had that problem in a .219 AI.
Do anneal the brass before fireforming unless you want to lose a bunch of the cases to shoulder splits.
