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The 50 Browning Machine Gun, sometimes known as the 50 BMG, is a 50 in (12.7 mm) caliber cartridge that was created for the M2 Browning heavy machine gun in the late 1910s and entered formal service in 1921. The machine gun was initially produced during World War I, and despite being cumbersome, the tank began to find its place on the battlefield—it was also resistant to most rifle and artillery shots. The 50 BMG cartridge has a 290-gram capacity (19 g). The round is a scaled-up version of the 30-06 Springfield, but it has a case wall with a long taper to make feeding and extraction easier in different guns. This cartridge's rifling twist rate is 1 in 15 in (380 mm), with eight lands and grooves. The 50 Browning Machine Gun is employed in anti-materiel rifles in addition to the M2 Browning heavy machine gun. There is a wide range of ammunition available, and match grade ammunition has boosted the use of 50 caliber rifles by allowing for more precise firing than lesser quality rounds. During WWII, the 50 BMG was principally utilized for anti-aircraft duties in the M2 Browning machine gun, both in its "light barrel" aircraft mount form and the "heavy barrel" (HB) version on ground vehicles. Depending on the powder and bullet type, as well as the weapon from which it is shot, the 50 BMG round may create between 10,000 and 15,000 foot-pounds force (14,000 and 20,000 J). The 50 BMG's trajectory suffers less "drift" from cross-winds than smaller and lighter calibers due to the high ballistic coefficient of the bullet, making it an excellent option for high-powered sniper rifles.
700 Nitro Express Ammo With a metric designation of 17.8 × 89mmR, the 700 Nitro Express Ammo has its origin in the United Kingdom. It is a big game rifle cartridge. It was developed in 1988 by Jim Bell and William Feldstein and built and produced by Holland and Holland, a British company in London. Feldstein had tried getting a .600 nitro ammo made for him, but H&H had ceased production. So he and Jim Bell went on to design the .700 Nitro Express Ammo, and it attracted the interest of Holland and Holland. The 700 Nitro Express Ammo has no parent case, a bullet diameter of 0.700 inches (17.8mm), and a rim diameter of .890 inches (22.6mm). Its overall length is 4.20 inches (107mm), and it is straight-rimmed with a rim thickness of .060 inches. It is called a big game rifle because the 700 Nitro Express Ammo was designed to take down mammoth animals like elephants, rhinos, hippos, and their likes. It is one of the world's biggest and strongest big game cartridges ever produced. It is the world's largest double rifle and weighs 1000 grains. It is effective ammunition to use in practicing long-range marksmanship. The 700 Nitro Express ammo can deliver roughly 53,450 joules of force to the human body and can dislocate the shoulders. While it is hard to find and usually has to be made on request, the 700 Nitro Express ammo is one of a kind and should convey that the expense is worth it.