I know that the 6.5 Gendel is formed from the 7.62 x 39 Russian . What goes in to this case forming? Is there a form die set available? At this point I am buying factory ammo to get me a start on brass to work with, But I do have some new 7.62 x 39 brass collecting dust . I am not sure if it is worth reforming, I do case for other rifles but they are all bolt action, this one is an AR-15 has any one done this?