Tactical Rifle Shooters’ Facebook posts and photos. Another.300 Blackout catastrophe. Unfortunately, the.300 Blackout can fit into a.223 Rem cartridge. A.308 bullet fired in a.223 bore will result in disaster. The compact 30-caliber.300 AAC Blackout, also known as “300 BLK”, was designed to fit into AR-15 rifles. It has a smaller cartridge case that can accommodate the larger 30-caliber bullet, while still fitting into a standard AR-15 mag. Unfortunately, this is the danger. Unscrupulous shooters can mix.223 Rem and.300 Blackout rounds without noticing. The.300 BLK cartridge will chamber and fire with ease because the case-head is the same size as the.223 Rem (5.56×45). The problem is that this forces a.308 bullet into a.223 bore that’s undersized. Not good! These images were posted by Tactical Rifle Shooters Facebook. The message was clear. “Don’t run 300 Blackout through your.223/5.56mm. It won’t work out well. Image from Accurate Shooter Forum. The jammed.30 Cal bullet is shown in a cutaway view:
Here are some tips for those who must have a.300 blackout: 1. Use different colored magazines when comparing.300 Blackout to.223 Rem.
2. Fit all uppers with caliber-labeled port covers.
3. Mark upper handguards in.223 Rem with the caliber painted in bright paint.
4. Mark all.300 Blackout rounds with a heavy black marker. People who viewed these.300 Blackout disaster photos: “The.300 Blackout round is a badly designed round.” A properly designed round would have had an element in its shape that would have prevented the cross loading from the start.” — D. Santiago. “I almost did that mistake… I kept a magazine of 300 Black in my.223/5.56 for the entire night. Fortunately, I didn’t pull the trigger. B. Welch: “Happened while I was hog hunting in a helicopter. Gun exploded in front of me.” — B. Hood “Fireforming projectiles are so wrong in centerfire!” – M. Stres Had a dude come in the store the other day asking for.300 Blackout ammunition to shoot in his 5.56 AR. It took him 15 minutes to understand that you need a.300 blackout upper! — R. Williams
