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. http://www.luchtbuks.net/index.php?showtop...T>
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. http://www.luchtbuks.net/index.php?showtop...T>ASD - Apres 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). http://www.luchtbuks.net/index.php?showtop...;/A>.
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.
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.
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.
Het symbool 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.
FAC 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
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.
Joule (J) Unit of measurement for Energy, being the amount of energy required to lift a one pound weight about nine inches.
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.
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.
Objective The optical lens in riflescopes that receives light and forms the primary image. The image is magnified by the Ocular.
Parallax 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.
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 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.
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.
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 Rail Machined grooves or rail to which the the scope mounts are attached.
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.
Windage The adjustment on the scope or open sights to compensate for horizontal Deflection of the bullet.
NOTE Terms and descriptions are related to airguns