Now that we have made the circle, the flatest shooting most reasonable priced and easiest to find ammo for and will cover all the average hunters needs would be a 22-250 and a 270 Win. You can go hotter and more expesive but why would you need to. Flat shooting and tons and tons of energy don' t kill a thing that the old standards won' t for a fraction of the money. They also won' t turn the average hunter into a super marksman who can take any practical advantage of such ballistics.