Has anybody ever reloaded the Winchester supreme brass from the black box. It is silver and I am assuming it is nickel. I would be neck sizing only. Also looking for loads for a Rem 700 in.243 with a 1 in 9 1/8 twist and a 26 inch barrel. I want to use 87gr. v-max bullets and, have IMR4350 , H380 and IMR4895 powders on hand. I was going to use the IMR4350 but would an other powder be more suitable for this rifle and bullet.