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Begrippenlijst (Engels)

#1 Gebruiker is offline   Sjoerd Icoon

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Gepost 14 oktober 2003 - 20:22

Begrippenlijst (Engels)


Accessory Rail
 A metal track for mounting hand stops or slings, installed in the fore-end of the stock. Letterlijke vertaling: Accesoire profiel. Geprofileerde metalen strip waar bepaalde accesoires aan kunnen worden bevestigd, bipod, riem, handstop, laser en dergelijke. Ook bekend als UIT rail, is bevestigd aan de voorkant van het wapen.>

Accuracy The ability of a firearm to consistently Group all its shots close together at a given distance under optimal conditions. Accuracy does not take into account human error or environment conditions. Het vermogen van een wapen om op consistente wijze de pellet schot na schot op dezelfde plek op het doel te laten terechtkomen. Accuratesse wordt niet beinvloed door menselijk handelen of door weersinvloeden. ASD - After Shoot Dip.

Barrel Time
 The time elapsing between the bullet starting to leave its seat until exiting the muzzle. Barrel Time and
Lock Time are significant, as they can greatly affect the Point Of Impact. Ook wel Locktime genaamd. De tijd tussen het overhalen van de trekker en het verlaten van de pellet van de loopmonding. Is van grote invloed op de POI (Point Of Impact).;/A>.

Bead Sight The cylindrical top part on some front sights. Ronde of afgeronde paalkorrel.

Bedding The fitting of the action with the stock. Passing van de actie in de kolf.

Benchrest A specifically designed support, e.g. a table (rest).>

Bipod A two-legged support attached to the fore-end of the stock.

Bluing The chemical treatment to color ferrous metal parts in various shades of blue or black.

Breaking In A Barrel Process of initial use of a factory-new bore by firing a certain number of shots and cleaning frequently. Breaking In the barrel should be done before trying to attain good Groups. 500 to 800 pellets are usually sufficient.

Bullet Drop The measure of a projectile's drop after the projectile crosses the line of sight for the second time; beyond the zero or sighted-in range.

Bump Bring Up My Post, term die gebruikt wordt in een post om een advertentie/topic weer actueel te krijgen.

Caliber (cal)
 The numerical value of an approximation of the bullet diameter in inches or millimeters.

Checkering A diamond-like pattern in the stock for ornamentation or improved gripping.

Cheekpiece A raised part of the side of the stock of a shoulder-arm.

CO2 Chemical formulae for carbon dioxide. Precharged pneumatic guns use a sear that hits a valve releasing pressurized CO2 into the barrel and propels the bullet.

DJV De Juiste Vetten. Deflection
 The change in the path of the projectile due to passing through a medium or caused by wind.

Diesel Effect A detonation inside the pressure chamber when grease evaporates and the resulting gases ignite, caused by the heating of the compressed air in conjunction with the heat the piston seal generates while moving along the chamber walls. The Diesel Effect is unpredictable and dreaded, as its resulting excess recoil can easily damage scopes, even those which are designed to take the Spring Piston-specific type of Recoil.

Drift Lateral movement of a bullet away from the line of bore, caused by its rotation on its axis, in the direction of the rifling twist. With airguns, drift is not a significant value.

Drop at Comb The vertical distance from the line of sight to the comb, or Monte Carlo, of the stock. It is measured from an extension of a straight line drawn from the base of the front sight bead across the top surface of the open rear sight adjacent to the notch.

Drop at Heel The vertical distance from an extended line of sight to the heel of the stock.

 Kinetic energy of a projectile. See also
Foot-Pounds and Joules.

:f:    Het symbool :f: komt voort uit de Duitse wetgeving. In Duitsland zijn luchtdrukwapens niet vergunningplichtig, zo lang ze geen hogere mondingsenergie dan 7,5 Joule hebben. Dit staat gelijk aan ongeveer 5,5 ft/lbs. Daarboven is het wapen volgens de Duitse wetgeving WBK-plichtig. WBK = Waffen Besitz Karte (de vergunning dus). Het symbool vind je op in Duitsland gekochte wapens welke aldaar niet vergunningplichtig zijn. Op wapens die in andere landen zijn gekocht en een lagere mondingsenergie hebben dan 7,5 Joule, hoeft het symbool dus niet voor te komen.

  De afkorting FAC komt uit de Engelse wetgeving. In Groot-Brittannië geldt namelijk ook een maximale mondingsenergie voor luchtdrukwapens, alvorens een wapen vergunningplichtig wordt. De limiet in Groot-Brittannië ligt op 12 ft/lbs, oftewel ongeveer 16,3 Joule. Daarboven moet je een FAC hebben. FAC = Fire Arm Certificate (de vergunning dus).

Feet Per Second (ft/s)
 Unit of measurement of the speed a projectile flies with. Also see
Meters Per Second and Velocity.

Foot Pound (ft/lbs) Unit of measurement for Energy, being the amount of energy required to lift a one pound weight one foot.

GHWTN-Gematigde Hans Weihrauch Taliban Nederland

 The smallest circumferential dimension at the pistol grip of a stock.

Grain (gr.) Measure of weight applied to bullets. 1 grain equals 0.0648 grams.

Grooves and Lands make the Rifling of a barrel. The grooves are the lowered areas between two lands.

Group A cluster of bullet holes made by the same airgun/pellet combination, formed from numerous shots fired at a target using the same point of aim, for checking accuracy. A 10-shot group provides useable statistics.

Group Size Usually measured center-to-center, the maximum distance between the centers of the two farthest shots in a Group.

Hand Stop A device attached to the stock's fore-end to prevent the supporting hand from sliding forward.


Joule (J) Unit of measurement for Energy, being the amount of energy required to lift a one pound weight about nine inches.


Lands and Grooves make the Rifling of a barrel. The lands are the raised areas between two grooves.

Length Of Pull The distance from the vertical center of the trigger to the vertical center of the butt plate or Recoil Pad.

Lock Time The time elapsing between the trigger release and a.) on Pneumatic and CO2 airguns: the release of pressurized gases into the barrel; b.) Spring Piston airguns: the piston reaching the fore end of the pressure chamber. Since no one can hold a firearm absolutely steady while shooting, the longer the Lock Time, the higher the chances to inadvertently move the weapon before the bullet has actually left the barrel. The Recoil can also greatly affect the Point Of Impact due to the Lock Time and Barrel Time, Spring Piston airguns have the highest Lock Time, one of the reasons why they are excellent training weapons, as they force the shooter to pedantically apply the rules of marksmanship.

Meters Per Second (m/s) 
Metrical unit of measurement of the speed a projectile flies with. Also see
Feet Per Second and Velocity.

Mid Range Trajectory In its parabola-shaped path, the highest vertical distance reached by a bullet above the line of sight.

Mil Angular unit of measurement used to estimate distance and size: 1 Milradian is 1/1,000 of the distance; 1 meter at 1,000 meters; 1 yard at 1000 yards. 360 degrees consist of 6,400 Mils by military definition, 6283.2 mathematically.

Minute Of Angle (MOA) Angular unit of measurement used to describe the Accuracy. One MOA equals 1/60th of a degree (21,600 minutes in a complete revolution) and subtends 1.0473 inches at 100 yards, or, as a rule of thumb, 1 inch at 100 yards. 1 Mil contains 3.44 MOA.

Monte Carlo A stock with a raised comb.


 The optical lens in riflescopes that receives light and forms the primary image. The image is magnified by the

Ocular Also known as the eyepiece. The magnifier lenses between the optical system and the eye.

Off-hand Position A position in which the shooter stands upright, not resting the rifle or his body on or against any supporting object.

Open Sight Rear sight of traditional open-topped V-notch or U-notch.

The apparent movement of the target in relation to the
Reticle when the shooter moves his eye in relation to the ocular lens. When the target's image is not focused on the same focal plane as the riflescope's reticle, a parallax error is the result. For varmint shooters, improper Parallax adjustment can easily make the difference between a hit and a miss.

Pneumatic Precharged air tank system. The sear hits a valve that releases pressurized air into the barrel and propels the bullet.

Point Blank The shooting distance to which one can hit a specified target area without modifying the Point Of Aim. The Mid-Range Trajectory and the Bullet Drop will both fall within the specified area.

Point Of Aim (POA) The point on a target on which the sights are optically aligned.

Point Of Impact (POI) The point where the bullet hits. By adjusting the sights, the point of impact can be made to coincide with the Point Of Aim at a preselected distance; hence we say the rifle/sight/pellet combination is "zeroed" or "sighted in" at that range.

Probability Of Hit (POH) Refers to the chance (0 to 100%) that a given round will hit the target at a given range, depending mainly on the gun's Accuracy.


Rate Of Twist 
Rifling Pitch is the distance the Rifling needs to spin down the barrel for it to complete a single revolution.

Recoil The rearward thrust caused by the propulsion of the piston or the bullet. Spring piston airguns have also a very aggressive and powerful forward kick, caused by the piston hitting the front end of the pressure chamber. It is this second forward snapping that can damage even high-quality riflescopes. The recoil can have be devastating to the system when the airgun diesels. See also Diesel Effect.

Recoil Pad A rubber or leather pad at the end of the butt to absorb the Recoil.

Reticle In scopes, the element which is optically referred to the target, consisting of straight or tapered cross-hairs, dots, or other marks used to determine the Point Of Aim, size of, or range to the target.

Rifle Cant Any leaning of the rifle to one side from a vertical position during firing, increasing the potential for misses, especially at longer ranges.

Rifling Twisted Lands and Grooves are placed into a barrel to impart spin on the bullets that pass through it. 

Rifling Pitch or Rate of Twist is the distance the Rifling needs to spin down the barrel for it to complete a single revolution.

Scope Creep
 An unwanted effect where the
Scope Mounts creep along the Scope Rail. During the firing cycle of Spring Piston powered gun, the piston bangs into the front end of the compression chamber, making the entire gun to snap forward violently. There are systems that eliminate scope creep for good.

Scope Mounts Devices for mounting a scope to a rifle.

Scope Rail Machined grooves or rail to which the the scope mounts are attached.

Sight-in The sight adjustments to get the Point Of Aim to coincide with the Point Of Impact at a preselected distance. It is bets done by firing 3 to 5 shot groups between each adjustment.

Silencer A device designed to muffle the sound of the discharging of pressurized gases exiting the muzzle. See also Suppressor and Sound Moderator.

Spring Piston The mechanical part within the pressure chamber that moves forward under steel spring or gas spring pressure, compressing the air in the chamber and pushing it into the barrel. The piston front consists of a sealing.

Suppressor A device designed to nearly totally absorb the sound of the discharging of pressurized gases exiting the muzzle. It can also be an integral assembly with the barrel. See also Silencer and Sound Moderator.

Sound Moderator A device designed to moderate the sound of the discharging of pressurized gases exiting the muzzle. See also Suppressor and Silencer.

Swivel The attachment hook for the sling to the stock.

Terminal Velocity
 The speed of the projectile upon impact with the target.

Trajectory The path of a bullet in flight. As gravity causes a projectile to drop from the moment it exits the muzzle, its trajectory is always curved in the shape of a parabola.

Trigger Pull The force that must be applied to the trigger for it to release the sear. A good Trigger Pull must be appropriately light, and the release must be a clean, sharp snap.

Turret The housing for the adjustment of windage and elevation dials on riflescopes.


 The speed of a projectile, measured in either
Feet Per Second or Meters Per Second.

 The adjustment on the scope or open sights to compensate for horizontal
Deflection of the bullet.


 The range at which the
Point Of Aim and the Point Of Impact are identical. See also Bullet Drop, Trajectory.


NOTE Terms and descriptions are related to airguns


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