If you want a gun that will do ALL you need and don't want to have to reload or pay a fortune for ammo, go for either the 30-06 or the 7mm rem mag. Ammo available basically anywhere.

If you reload or don't mind payinga lot for ammo, the sky is the limit.

That said, I own a 7mm rem mag and a 338 win mag.

However, I only seem to hunt with my muzzleloader and bow for elk these days! If you ever go for elk in September, you won't hunt any other season!