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The 6.8mm Remington Special Purpose Cartridge (6.8 SPC, 6.8 SPC II or 6.8×43mm) is a rimless bottlenecked intermediate rifle cartridge that was developed by Remington Arms in collaboration with members of the U.S. Army Marksmanship Unit and United States Special Operations Command [6] to possibly replace the 5.56 NATO cartridge in short barreled rifles (SBR) and carbines.
Magpul created a larger variation of their PMAG magazine, called the "Black Widow," with a blood-red follower for the 6.8mm round. The upper and lower receivers were developed specifically to fit this Magpul magazine and optimized around the 6.8×43mm round. The flagship model of the Six8 series is the UCIW which features an 8.5-inch barrel.
In 1925, Winchester introduced the .270 Winchester, previously known as the .270 WCF, based on the 30-03 Springfield case necked down to .277" (6.8 mm). Although the .270 Winchester was not an instant success, within a few decades it became one of the most popular big game hunting cartridges for mid sized game worldwide, because of its relatively mild recoil and flat trajectory within ...
The throat of the .300 Styria Magnum is similar to the proven .308 Winchester and short enough to seat the bullets to the lands without exceeding the maximum length of 84.8 mm (3.339 in) to fit the original Mauser 98 magazine. The thick-walled 8×68mm S parent case manufactured by RWS can handle a usage piezo pressure up to 460 MPa (66717 psi).
20-round detachable SR-25 pattern box magazine [7] 25-round detachable SR-25 pattern box magazine [ 8 ] (optional) The XM7 , previously known as the XM5 , is the U.S. Army variant of the SIG MCX Spear , a 6.8×51mm (.277 in) , gas-operated , magazine -fed assault rifle [ 1 ] designed by SIG Sauer for the Next Generation Squad Weapon program in ...
The 8×64mm S (also unofficially known as the 8×64mm S Brenneke) (the S means it is intended for 8.2 mm (.323 in) groove diameter bullets) is a rimless bottlenecked centerfire cartridge developed as a military service round for the German Army who never issued it.
The .277 Fury or 6.8×51mm Common Cartridge [4] [5] (designated as the .277 SIG Fury by SAAMI) [1] is a centerfire rimless bottlenecked rifle cartridge announced by SIG Sauer in late 2019. [2]
The 6.5mm Creedmoor designated as 6.5 Creedmoor by SAAMI, and as 6,5 Creedmoor by the C.I.P. [4] is a centerfire rifle cartridge introduced by Hornady in 2007. [6]It was developed by Hornady senior ballistics scientist Dave Emary in partnership with Dennis DeMille, the vice-president of product development at Creedmoor Sports, hence the name.