Posted 07 November 2006 - 08:28 AM
I am waiting for a .20 Cooper VarTarg to arrive (Jan or Feb), and need to know about fire-forming the new Remington cases after they have been re-sized from the .221 Fireball cases. The Precision Shooters Reloading Guide suggests seating the bullet so that is just lightly touching the rifling. I will use a Stoney Point tool to determine this. But.....I read somewhere that a maximum load should be used, or the case will not expand enough to make the fire-forming work as intended.If I am to start with loads at 10% below published maximum powder charges, how can I fire-form? Or, do I first work up a few loads to determine the maximum load pressure, then load all subsequent rounds to maximum so as to fireform the remaining cases? And if this the case, I would be locked in to firing maximum loads for each cartridge on the first firing. If this is what I must do, I will do it. Or, is fire-forming even necessary after reforming the cases down to the .20 VT? Am I on the right track here?