seeing that you did so well with your 7mag,your jump up to the sako stw''s a great choice. my 75ss/syth. likes 160 ab yeah its shoots the 140 at high speed but they fragment to scrap. for elk i'd go with a partition 150 at the lightest,but i prefer 160's weight all around don't forget barnes bullets they work great. never burned any re-25,had good luck with re-22 and h-1000,people talk up imr 7828 but its so so in my sako.rem brass fed-215 mag or match primer and work up your loads with the ladder test. your scope will work fine,when the stw was still a wild-cat i shot nosler 160 partitions into 1 moa easy at 1000 yds, witha rechambered stock 7mag 700 rifle, my smith said that rem barrel was the straightest rem . barr he'd spun between centers. so load some up and use what ya got.