This results in bullet trajectory obliquely departing from point of aim as distance increases.ĬATASTROPHIC BRAIN SHOT: A special one-shot kill to the brain stem or neural motor strips that kills so instantly that body reflexes cannot react. Ic develops a keen, almost subconscious ability to accurately "know" if your shot was dead-on, right/left, or up/down purely by how it "felt" when fired.ĬANTING: Turning or dipping the barrel slightly right or left, usually as the result of a bad sight picture or improperly mounted scope. A baseline trajectory used for computing other ballistic data.īULLET DROP COMPENSATOR (BDC): A knob mounted atop a rifle scope by which the shooter can adjust elevation without rezeroing the weapon so that he can fire quickly ac varying distances and aim directly at the target instead of "holding." Some Bullet Drop Compensators use internal cams to synchronize adjustments for specific bullets at specific distances.īULLET TRACE: Also called "bullet track," this is a tiny but visible wisp of trail left through mirage by a bullet's shock wave.ĬALLING A SHOT: The practice of "calling" where your shot impacted just after firing but prior to observing it through a spotting scope. Also called a "collimator."īULLET DROP: The ballistic measurement of how far a bullet drops, at 100-yard intervals, were the barrel pointed perfectly parallel to the earth. This greatly speeds subsequent live-fire zeroing. Boat-tail bullets have better long-range accuracy than other bullet designs.īODY ARMOR: Various kinds of vests designed to protect wearers against injury from fragmentation and small-arms fire.īORESIGHT: An optical device inserted in a rifle muzzle to tentatively zero a rifle scope by setting its crosshairs coaxial to the rifle's bore. It should never be attached to the barrel.īOAT-TAIL BULLET: An aerodynamic bullet design shaped like a boat, with a pointed tip and gradually tapered to a flat base. 535!īALLISTICS: For purposes of marksmanship, knowledge of data concerning the trajectory, velocity, and energy of bullets.īEANBAG: An old sock or small cloth bag filled with a dry material, such as sand, and placed below a rifle butt's heel so it can be squeezed to lower or elevate the rifle for precise aiming.īIPOD: A two-legged support attached to the rifle forearm for better stability. 205, while the same weight 7.62mm boat-tail's coefficient is dramatically better, at. However, identical-weight bullets of the same size will have different ballistic coefficients if they are of different styles: a 180-grain 7.62mm round nose has a ballistic coefficient of. 484-meaning the heavier bullet will perform better at extended ranges. For instance, the Federal 55-grain 5.56mm BTHP rating is. The higher the rating- expressed in decimal points-the higher the bullet efficiency at long range. Although he's not out of danger, he has a much higher probability of surviving enemy counter-sniper fire.īALLISTIC COEFFICIENT: A rating system based on a bullet's weight, shape, and ability to retain velocity. (See Triangulation Detection Technique.)īACKSTOP: Any material through which your rifle's bullet will not pass, located behind your target's location so that bystanders, hostages, and other friendly forces will not be endangered by friendly sniper fire.īALLISTIC ADVANTAGE: A concept whereby a sniper should seek engagements only when he's at least 400 yards away from his quarry and beyond the effective range of enemy riflemen. Snipers should cover dismounted avenues of approach.īACK AZIMUTH DETECTION TECHNIQUE: A technique to identify an enemy sniper's position by inserting a cleaning rod or dowel into his bullet hole, noting the angle of trajectory to estimate the range, then recording its reverse azimuth to determine the direction from which the shot was fired. (See Primary Position and Supplementary Position.)ĪVENUE OF APPROACH (AA): A road, path, or open area across which the enemy could advance toward you, depending on whether he's mounted or dismounted. A sniper should have several alternate positions. ALTERNATE POSITION: A backup position selected by a sniper to which he can displace and still shoot into his original sector of fire.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |