A term that is sometimes used for oceanic crust rocks is sima, which is short for magnesium silicate, a common component of these rocks. Another term for these undersea igneous rocks is mafic, which comes from the fact that they are high in magnesium and iron. Basalt and gabbro are examples of mafic rocks.
The current record is held by Briton Corporal of Horse (CoH) Craig Harrison, of the UKâs Household Cavalry, who recorded a 2,475 m (2,707 yd) shot (confirmed by GPS) in November 2009, also during the War in Afghanistan, in which he hit two Taliban insurgents consecutively.
The current longest recorded kill made with a rifle chambered in .308 was recorded as 1,250 meters, or just over 3/4 of a mile.It was made by then-Staff Sgt. James Gilliland of the 3rd Infantry Division in Ramadi, Iraq on September 27, 2005.hese Things We Do, So Others May Live. The current longest recorded kill made with a rifle chambered in .308 was recorded as 1,250 meters, or just over 3/4 of a mile. It was made by then-Staff Sgt. James Gilliland of the 3rd Infantry Division in Ramadi, Iraq on September 27, 2005.