Sight Alignment of a Rifle
The flight of a bullet is not a straight line to the target. Gravity, air resistance and energy loss all have an effect on flight. A hunter must always take that into consideration when sighting-in. A bullet sighted-in to hit a bull's eye at 100 yards might be one inch above the bull's eye at 50 yards. The hunter needs to know what type of game will be hunted and only sight-in with the ammunition that will be used in the hunt.
The key to sighting in a firearm is to reduce all movement of the shooter and the rifle. The hunter needs a good solid bench to sit at, and a solid rest for the firearm - sandbags, carpeted wooden blocks or a tripod all work well.
Breathing causes your body to move. It is important that you exercise breath control when shooting. To properly control your breathing, take a deep breath, exhale normally and stop breathing. Acquire proper sight alignment and sight picture, then squeeze the trigger. You should be able to hold your breath for six to eight seconds. If you cannot fire the shot within this time, take a breath or two, relax and repeat the process.