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The VPAM scale as of 2009 runs from 1 to 14, with 1-5 being soft armor, and 6-14 being hard armor. [1] Tested armor must withstand three hits, spaced 120 mm (4.7 inches) apart, of the designated test threat with no more than 25 mm (0.98 inches) of back-face deformation in order to pass.
It is fitted with a high-efficiency muzzle brake which reduces the felt recoil to about the level expected of a 7.62×51mm NATO-chambered rifle. [3] The rifle is equipped with both an adjustable front bipod and a rear monopod for maximum accuracy. The stock is also adjustable.
This means that 4.6×30mm chambered arms in C.I.P. regulated countries are currently (2018) proof tested at 5,000 bar (500 MPa; 72,519 psi) PE piezo pressure. [6] Despite the relatively high Pmax the bolt thrust of the 4.6×30mm is on a similar level when compared with traditional service sidearm cartridges.
The zero range, , is important because corrections due to elevation differences will be expressed in terms of changes to the horizontal zero range. For most rifles, is quite small. For example, the standard 7.62 mm (0.308 in) NATO bullet is fired with a muzzle velocity of 853 m/s (2800 ft/s).
The BFG ("Big Fucking Gun") [1] is a fictional weapon found in many video games, mostly in id Software-developed series' such as Doom and Quake.. The abbreviation BFG stands for "Big Fucking Gun" as described in Tom Hall's original Doom design document and in the user manual of Doom II: Hell on Earth.
The .458 SOCOM (11.63×40mmRB) is a moderately large round designed to work in an AR-15 platform.This is achieved by installing a 458 bolt and barrel. The 300-grain (19 g) round offers a supersonic muzzle velocity of 1,900 ft/s (580 m/s) and 2,405 ft⋅lbf (3,261 J), [1] similar to a light .45-70 but with a much smaller case.
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For short-range target shooting, typically on ranges up to 50 meters, or 55 yards, with low-powered ammunition like .22 long rifle, aerodynamics is relatively unimportant, and velocities are low compared to velocities attained by full-powered ammunition.