Sighting in
In
Because when using a
The iterative procedure involves firing a
Grouping
Bullets discharged from a firearm immobilized in a device such as a
Reasons for sighting in
Firearms carried by individuals may be positioned differently from one shot to the next. Most firearms have sights to assist the shooter in positioning the firearm so bullets will strike the desired location. Precision machining used in manufacture of modern firearms and testing prior to distribution have improved the probability these sights will be correctly positioned; but various factors may cause bullet placement to be different from expected:
- Sights may have been loosened or moved from their intended positions since the last test firing.[4]
- Optional telescopic sights may have replaced original iron sights.
- The firearm may have been sighted in for a different target distance.
- The shooter may be using different ammunition than used for previous testing.[5]
- The shooter may involuntarily move the firearm while pulling the trigger.[5]
- The shooter may hold the firearm in a way allowing unanticipated movement during recoil.
- The shooter may have vision abnormalities producing an unanticipated sight picture.[5]
Targets
Sighting in a firearm is an important test of the ability of the firearm user to hit anticipated targets with available ammunition. Pictures or silhouettes of intended targets are less suitable for sighting in than high contrast shapes compatible with the type of sights on the firearm. Contrasting circles are commonly used as sighting in
Procedure
The diameter of the group for a single sight setting is irrelevant to the sighting in procedure so long as all bullet positions can be measured to determine average point of impact in comparison to point of aim. Larger diameter groups indicate reduced hit probability on smaller targets at that range and suggest groups with a larger number of shots may provide better estimates of required adjustments. Sighting in is most effective from a stable shooting position allowing the shooter to relax while the firearm is supported on a
See also
References
- ^ "Sighting-In your Rifle". Alaska Department of Fish and Game. Retrieved 13 October 2017.
- ^ a b Camp, Raymond R. (1966). The New Hunter's Encyclopedia (Third ed.). Harrisburg, Pennsylvania: The Stackpole Company. pp. 567&568.
- ^ Barnard, Jeff (9 September 2016). "Sighting-in my rifle". MyODFY. Retrieved 13 October 2017.
- ^ Kalkomey Enterprises. "Sighting-In a Rifle". Michigan Hunter Ed Course. Retrieved 13 October 2017.
- ^ a b c d "Sighting in a Rifle: Do it Right, So You Can Depend On It". Elk Hunting Tips. Retrieved 13 October 2017.
- ^ Hung, Eric. "Sight Picture & Eye Dominance". Pew Pew Tactical. Retrieved 13 October 2017.
- ^ "Sighting-in". Hunting University. MagTech Ammunition. Archived from the original on 14 October 2017. Retrieved 13 October 2017.
- ^ a b Boddington, Craig. "How to Properly Zero a Rifle in Five Steps". Shoot101. Guns & Ammo. Retrieved 13 October 2017.