im trying to make up my mind i want to build this rifle on a montana 1999 action or mod 70 action with a mcmillan a3 sporter or a a5 and a 28 or 30in lilja bbl i just cant make up my mind on the caliber i want some thing that will push light bullets realy fast and still be able to shoot bergers my top 5 starting first to last 7mm stw 6.5 stw 7mm-300win 7mm rum and the good old 264 wim mag so thats what im thinking i was hopein i could get some input on the pros and cons of one vs the other the idea is barnes out 600 maybe and bergers out a 1000 and for targets thanks for any input or ideas