If your rifle is like mine, there's a fine line on getting it to work. . In this case, your best bet is to look for 300 Blackout ammo in the range of 75 to 150 cents per round. Born in the early 2010s when a few unnamed military special operators needed a specialized close-combat round, the .300 AAC Blackout is no passing fad -- the BLK has become one of the most popular AR cartridges around. If you want to fire 300 Blackout through your AR-15, all you have to do is buy a 300 Blackout upper, slap it on your AR-15 lower, load up your AR-15 mags with 300 Blackout ammo, and start shooting. If you want to shoot it through your AR-15, all you have to do is buy a 300 Blackout upper, load up your regular AR magazines with 300 Blackout ammo, and start shooting. TNVC/NGI Giveaway: 15 winners with over $7000 worth of prizes!! Crooks are wearing body armor more frequently when committing home invasions and soft armor can be found in many pawn shops or online for less than you might think. 4 Reasons .300 Blackout Is a Terrible Choice for Home Defense. AAC rigorously tested a variety of designs to make sure it perfectly fit standard AR-15 magazines, fed into the gun, and fired without a hitch. if you use bullets that are designed to expand while moving at subsonic speeds. As you learned a moment ago, the 300 Blackout has significantly more muzzle energy when fired through short barrels than the 5.56. Ruger Ranch American 300 BLK - Negative Things to Know Before Buying For example, some states like Iowa, Washington, and Minnesota only allow you to hunt deer with ammo thats .24-caliber or wider (which excludes 5.56). Even after handloading, I still believe subsonic shooting is the forte of the .300 AAC Blackoutjust as J.D. Are you running a can with your subsonic and are the subs factory or handloads? For example, I have an AR-15 upper that fires 5.4539, but I have to be careful which magazines I use as some of them simply wont feed this Russian ammo properly. Aero Precision M4E1 Complete Rifle. What about supersonic .300 Blackout, you say? Some would even say the 300 Blackout is too good at penetrating obstacles. You wont find a cartridge that does it all better than the 300 Blackout. None of the primers in Lehigh Defense brass were crimped, but all of them in the Federal brass were crimped. Some people question whether or not the 300 Blackout is effective for killing deer, and the simple answer is, yesabsolutely. And how does that affect real-world accuracy? It can be used in AR-15s with minimal modification. . Please help with my 300 BlackOut Rifle!!! In other words, if you were to shoot a 5.56 through a 9-inch barrel, it would have significantly less muzzle energy than the 300 Blackout. Just for kicks, I also assembled subsonic loads with two heavyweight bullets. Lets consider the Blackout with 150-grain bullets at 2,100 fps. bullets hang onto it while deflecting minimally in the wind. Unfortunately, reducing the speed of a bullet also significantly reduces its energy. Short Barrel 338 Lapua Magnum Load Development Results, 300 BLK load development: 125, 135, 175 and 220 SMK with H110 and IMR 4227, Accuracy testing a 16 carbine: Daniel Defense Hammer Forged Barrel, Refreshing a poorly machined Remington 700 action, 223 Remington/5.56 NATO, velocity versus barrel length: A man, his chop box and his friends rifle, Replacing a plastic recoil pad on a shotgun, USMC M40A5 Build- Part 3: Receiver Truing, Fortune Favors The Brave.Even When Outnumbered, Customizing the 1911: countersink and flush cut slide stop pin, 6 Creedmoor barrel length versus muzzle velocity (31 to 17 inches). . Even worse is when a combine that harvests grain needs a part only made in China. No one doubts the deer-killing performance of the 30-30, and the 300 Blackout can match or exceed that. Imagine dumping a pile of money into a rifle and having it shoot some loads nearly 4 MOA!- I was that guy- something I seldon experience during the load development process. I have tried a lighter weight buffer as well. It wasnt the precision love fest I envisioned. The 300 Blackout was designed to be used in AR-15s, with one simple change: As long as you change the barrel of your AR-15, which can be done by popping out two pins and putting on a new upper receiver, you can shoot 300 Blackout ammo out of your AR-15. All Rights Reserved, Botswana Safari with No Second Place Winner Bill Jordan (Part 2). Summary: The 300 Blackout has significantly more muzzle energy than the 5.56, and this is particularly true when youre shooting these cartridges through shorter-than-average barrels. For example, a 55-grain 5.56 bullet bullet traveling just under the speed of sound1,050 fpsonly has 135 ft.lbf. Its not uncommon for you to get a failure to eject or a failure to feed when using subsonic 5.56 ammo, which refers to any malfunction where the casing is pulled out of the chamber but not removed from the gun or when the next casing fails to enter the chamber. It appears woefully underpowered, yet, thanks to the higher B.C bullets it shoots, it outperforms our beloved old 30-30. This load was also the most accurate tested among both supersonic factory offerings and handloads. Post The muzzle energy, which is the energy of a bullet just after it leaves the barrel of a gun. A 300 Blackout bullet fired from a 14.5-inch barrel has almost the same muzzle energy as a 5.56 bullet fired from a 20-inch barrel.