Actually I'm not forming since I have plenty of all factory cases for the .17s and .222 Rem mags but you're right, there's also some trimming to be done as well as setting the shoulder back on the .222s. Returning for a moment to the .17 Fireball, through a fluke I ended up with two in that caliber, both 700 Remingtons. Thinking I could sell one at a gun show, towards the end of the day I had the price down to $300, new, including three boxes of factory rounds and a .17 caliber cleaning rod, but still no takers so I still have two .17 Fireballs. The Fireball just couldn't fly or it seemed too weird.