I recently picked up a Remington rolling block.It has a massive bull barrel on it and is chambered for the 219 Zipper.I got a box of ammo with it,and shot it a few days ago,and it shot pretty good.I got a set of dies,but am not at all familiar with such a rifle.Anybody out there ever fool with anything like that?From what data I've found,such powders as IMR 4064,Varget and 3031 seem to be what the cartridge works good with.Any help would be appreciated.