And heres how it looks compared to several other common rifle cartridges: The three cartridges on the left are different kinds of 300 Blackout ammo, followed by a 5.56 cartridge and a 7.6239 cartridge on the right. You can find factory, boxed ammunition anywhere from a 110-gr. Temperature: 68 to 87 degrees Fahrenheit. Another good example of this principle is that of the Glock 17 versus the Glock 17L. While this is a valid concern, there are easy ways around it. They came up with a solution for that problem, too. The 300 Blackout provides an elegant solution. As a general rule, then, you want your bullets to shoot flat, or with as little drop as possible. Snipers Hide is a community of Snipers of all kinds, focusing on long range shooting, accuracy, and ballistics. In my experience the 300 Blackout runs best with a pistol length gas system. This showcases the dual purpose of the round. The basis of their argument is that you want your rifle to have a barrel thats just long enough for all of the gunpowder to burn, and no longer. With a bullet that isnt over stabilized, factors that can be detrimental to accuracy, such as a concentricity issue, can be mitigated. ***What AR-10 Buffer/Spring are you running with the Magpul UBR? This test is a good example of the penetrating power of 300 Blackout: In the video, a 300 Blackout bullet penetrates 24 inches of pinewood whereas a 5.56 bullet only penetrates 16 inches of pinewood. The .300 Blackout started out as a military round. Perhaps one of the most sobering problems with .300 Blackout is the ability to chamber in a .223 or 5.56mm barrel. The Glock 17 has a 4.5-inch barrel and generally produces muzzle velocities of around 1,150 fps with 124-grain bullets. . ) . At 500 yards, the bullet has dropped almost 9 feet, making it more or less impossible to hit your target. Was I alone in my 300 BLK experience? They do not detail the comprehensive training, procedures, techniques and safety precautions that are absolutely necessary to properly carry on similar activity. . That's including two dismal groups caused by the inability to taper-crimp Nosler bullets.