Скачать или смотреть Quick Tip: .300 Blackout vs 7.62x39

Brownells Firearm Support Technician Caleb Savant compares the 7.62x39mm and .300 AAC Blackout (aka 300 BLK) rifle cartridges. Both rounds are similar in size, and when loaded with similar-weight bullets, their ballistic performance is almost identical. So what's the difference? The Russian 7.62x39 operates very reliably in the AK-47 platform, which was designed around it. Later, attempts were made to chamber an AR-15 in 7.62x39 to get a .30 caliber AR in a compact package, but the taper of the 7.62x39 case doesn't mesh well with the AR-15's straight magazine well. A reliable 7.62x39 AR-15 CAN be built, with fairly extensive modifications to the rifle. The .300 Blackout round uses a necked-up 5.56 NATO / .223 Remington case, so a standard AR-15 can be converted to it simply by changing the barrel! Both cartridges also work well in bolt action rifles, so they make excellent short-range hunting rounds, too.

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