Quote:
They're a small ammo maker who took their name (Double Tap) from a reference used by high capacity firearm (usually, but not limited to, 9mm) shooters to put two bullets into each adversary, before moving on to the next adversary, when facing multiple adversaries.
JMO, but if a shooter uses enough gun, there's no need for a double tap.
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The origin of the double tap technique is credited to William Ewart Fairbairn and Eric Anthony Sykes, British Police chiefs in Shanghai during the 1930s to overcome the limitations of FMJ (Full Metal Jacketed) ammunition. FMJ ammunition is commonly used by the Military for feeding reliability, adherence to the Hague Convention regarding non-expanding ammunition and improved armor piercing qualities. Even in the larger calibers (.45 ACP for example) FMJ ammunition can fail to transfer sufficient energy into an opponent to take him out of the fight quickly. In Ian Dear’s book Sabotage and Subversion about British Special Operations Executive (SOE) and United States Office of Strategic Services (OSS) forces, Fairbairn is reported to have instructed SOE personnel in the double tap from 1944 to 1945 at the SOE training school directed by Fairbairn and Sykes near Arisaig in Scotland. The SAS method of double tapping is when the shooter fires one shot through the neck in order to sever the spinal cord and then another shot through the eyes and an inch up. This ensures that the signal from the brain cannot reach their trigger finger and they cannot pull the trigger. The term "Double-tap" is now used to describe the broader technique of firing two rounds quickly and accurately to disable an opponent. The tactic is still used today by firearms handlers, police tactical teams, U.S. Army and U.S. Marine infantrymen, counter-terrorist military units, and other special forces personnel.
[edit] Theory
In the Double-Tap technique, after the first round is fired, the trigger is quickly pulled again as the muzzle drops down out of recoil. Ideally, both rounds should strike anywhere within the center of the target, within a tenth of a second.[citation needed] The technique is meant to impose fire control with a semiautomatic pistol while maximizing the potential of incapacitating the target despite the semiautomatics relatively weaker ammunition.
Extensive testing shows that after the third round of rapid, sustained fire, accuracy drops off sharply. Therefore, the Double-Tap technique gives combat accuracy without wasting ammunition. Furthermore, since single FMJ rounds tend to have poor terminal ballistics characteristics, a pair of bullets traversing through a target in close track (eg. the double tap) increases the probability of incapacitating a target. Also, since the center of mass is the most desirable target for a sidearm, firing two rounds helps compensate for the possibility that the first round might be deflected by heavy bone or miss a vital organ.
http://en.wikipedia.org/wiki/Double_tap