Which brass to use. What powder. Ok will be building a everything rifle for hunting and some F-class open. Anyways don't worry about the rifle. I want to know if the brass needs to be 25-06, 270, 30-06, I know I can use Lapua if I go with 30-06 right. Anyways mostly winchester to start with. Now which has less of a negative effect on brass, necking up or down. I also want a twist that will handle the lighter bullets for coyotes and heavies for bigger game. Anyways not a newby, just not much dealing withthe 6.5's yet. Thanks -EagleI