lots of good advice. Ill be short and to the point. 7-08, 308 win, 260 (little small for 700yard elk) and 300wsm would all be great guns. I am also a lefty and just got a savage 116 FLHSS in 300wm, had my smith put on a williams brake and now i have a 300 mag that weighs 8lbs scoped, recoils less than my .308 and hits like a sledgehammer. All of those mentioned will get it done.