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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.
8.6mm Blackout (8.6×43 mm), also sometimes referred to as 8.6 BLK, [1] is a centerfire rifle cartridge developed by the firearms manufacturer Q, LLC. [6] It utilizes a shortened case from the 6.5mm Creedmoor necked up to an 8.6 mm caliber (8.585 mm or 0.338 in diameter) projectile. 8.6 Blackout is designed for use in bolt-action rifles or as a caliber conversion for AR-10 style rifles.
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 ...
.300 AAC Blackout: 2011 US 2 [7] [13] R ... Based upon a slightly shortened .308 Winchester cases with FTX bullets and special powder to approach .308 ballistics from ...
.300 AAC Blackout.300 H&H Magnum.300 Blaser Magnum.300 ICL Grizzly.300 Lapua Magnum.300 Norma Magnum.300 Remington Short Action Ultra Magnum.300 Remington Ultra Magnum.300 Rook.300 Ruger Compact Magnum.300 Savage.300 Sherwood.300 Weatherby Magnum.300 Whisper.300 Winchester Magnum.300 Winchester Short Magnum.303 British.303 Magnum.303 Savage
The .300 AAC Blackout is a SAAMI-standardized .300-221. Hornady states that any rifle chambered for the 300 AAC Blackout can shoot their .300 Whisper ammunition, which is made within .300 AAC Blackout specs. The reloading dies for these two cartridges are often the same. [7]
The Bushmaster ACR is a modular semi-automatic rifle that is available for the civilian market in 5.56×45mm NATO, 6.8mm Remington SPC, .450 Bushmaster and .300 AAC Blackout. ACR BASIC – 16.5 in (419mm) barrel ACR ENHANCED – 16.5 in (419mm) barrel [9] ACR DMR – 18.5 in (470mm) barrel [38] ACR SBR – 10.5 in (267mm) barrel [39]
When comparing the .277 Wolverine to the 300 BLK, the 300 BLK has more options for the heavier sub-sonic bullets (168-220 gr), but when shooting the lighter super-sonic bullets (90-130 gr), the .277 Wolverine has a greater variety of better options, with each having an excellent ballistic coefficient (for hand-loading, .277 bullets are ...