Just wanted to use my resources wisely since we're never as prepared as we wanna be. I've got an assortment of good powder but more cfe223 n h4895. Probably best to work up with one of those. Got 3 did 123grain pills smk nosler and Hornady all bthp Hornady brass cci41's 18 in Criterion barrel AR platform.....Any help?? I guess mentioning it's a 6.5 Grendel would help