What do you want to do with it? That alone will help us pick a bullet. H1000 and retumbo are the go-to powders, Lapua brass is the best so use that for sure, and for primers I use fed 215 gm, i dont know what model cci primers people have had sucess with in this caliber. i shoot 280 grain Barnes LRX bullets on top of retumbo in Lapua brass lit with fed 215 gm.