Definitly the .270 Win. I had a 30-06 myself and was rather bored with it. Traded it in on a .270 and am very happy. Perfect gun to fill your gap so to speak. Would be perfect in the grains you mentioned and would kill just about any game you could think of in north america. Including moose. but in my opinion a great whitail, antilope, sheep etc... gun. You can' t go wrong with the .270 a gun that everyone should have in their collection. I sure love it in mine!