300 BLK
300 BLK load development: 125, 135, 175 and 220 SMK with H110 and IMR 4227
The 300 AAC Blackout (300 BLK) is a popular alternative cartridge in the AR-15/M16 M4 (AR) community. Known for its ability to deliver heavy subsonic bullets for standard AR magazines while cycling the action in suppressed applications, […]