There is presently no source for a set of dies to form the 7.62 nagant gas seal revolver cartridge.The Lee dies are meant to form 32-20 brass to seat a bullet conventionally without the gas check.The nagant cartridge is meant to seat a 98 grn.DEWC totally inside the (1.517OAL) Fiocchi case.The lee dies are made to re size 32-20 brass(1.308OAL)and crimp a bullet at the cannelure to achieve total over all length.Don't make the mistake I did by buying a whack of Fiocchi brass, a bunch of 98 grn DEWC,and a set of dies that won't make you anything.If anything do what I wound up doing ,get the Lee dies,a bunch of 32-20 brass and a mold to cast some 90 grn. round-nose bullets.