case is also used as the parent case for a modified variant that is not officially registered with or sanctioned by the C.I.P. or its American equivalent, the SAAMI. Such cartridges which use commercial factory cases are generally known as wildcats. By changing the shape of standard factory cases (decreasing case taper and/or changing the shoulder geometry) the wildcatter generally increases the case capacity of the factory parent cartridge case, allowing more propellant to be used to generate higher velocities. Besides changing the shape and internal volume of the parent cartridge case, wildcatters also can change the original calibre. A reason to change the original calibre can be to comply with a minimal permitted calibre or bullet weight for the legal hunting of certain species of game or change external or terminal ballistic behavior. In his spare time Chis E. Murray has been developing a cartridge which he calls the 7×46mm Universal Intermediate Assault Cartridge. The 7×46mm is designed to replace both the 5.56mm and 7.62mm NATO cartridges. It is low recoil and so can be used from carbines, but has long enough range to be used in machine guns and designated marksmen rifles. Its overall length has been optimized so that guns chambering it would be bigger than AR-15s but smaller than AR-10s. Reloading for the VZ-52 rifle in this chambering is a nuisance in the US. Boxer-primed cases can be easily formed via resizing and trimming 6.5mm Carcano brass, but these are difficult to obtain. Another route is to use Winchester .220" Swift, but in addition to resizing and trimming, this also requires turning the rims down on a lathe and cutting deeper extractor grooves. Speer makes a 130-grain .308" bullet which would otherwise be perfect for this round. Gallery See also 7 mm caliber List of rifle cartridges References Pistol and rifle cartridges Military cartridges