I drew a Washington St. moose tag this year and I'm a bow hunter and I'm going to try and harvest my moose with a bow. This is a once in a life time draw so I well take a riffle too. I have a 308 and well shoot 180 gr. bullets, I also have a 7mm-08 and can shoot 165 gr. bullets. My question well these guns work for moose or do I need a bigger one.