After Advanced Armament Corp (AAC) and Remington introduced it few years back, the 300 Blackout caliber has became the 2nd most popular AR-15 caliber after the .223 Rem/5.56mm. The AAC 300 Blackout has the advantage of using the same magazine and bolt group as the standard 5.56mm caliber on the AR-15 platform. Unlike the smaller .223 Rem caliber, the 300 Blackout could be easily suppressed with its wide selection of subsonic loads. Although it was developed specifically for a shorter engagement range of 100-300 meters, I always wondered how the 300 Blackout rounds would perform at longer distances.
When Travis Haley showed the video of him hitting steel targets at 800 yards with subsonic 300 Blackout rounds fired from a suppressed 8-in barrel AR-15, many were surprised and some were skeptical. Now I can confirm that not only is possible, but I have gone a step further and scored hits at 1000 yards with a 300 Blackout supersonic round.
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