Where to zero a rifle is up for debate
amongst hunters. Here is my opinion: I recommend zeroing your gun at
300 yards even if you would consider a 300 yard shot beyond your maximum
shooting distance. Here's why:
A 30-06 using a 165-grain bullet shot from a factory cartridge travels
about 2800 fps. This bullet will be 4.25 inches high at 100 yards and
reaches its maximum height of 5.3 inches at 175 yards. The 300 Win.
Mag. shoots a 180-grain bullet a little flatter. Don't worry if the
mid-range trajectory seems high. Conservatively speaking, the kill zone
of an elk is 18 inches deep and your bullet will strike well inside
of it even at closer distances. When zeroed at 300 yards you will still
be deadly, even for mule deer, out to 350 yards.
Once you have properly sighted in your rifle, we recommend that you
practice with it using various field positions as well as the specific
type of ammo you intend to bring. Experimenting from a bench on what
your rifle can do at various distances out to your maximum distance
will help, even though you may not take a shot as long as what your
gun is capable.