300 Blk - 240gr Sierra Match King subsonics
This video details a comprehensive test of the 240gr Sierra Match King bullet for 300 Blackout subsonic applications. The instructor, Johnny, meticulously tests handloads using Accurate 1680 and Hodgdon CFE Black powders in both an 8.5-inch SBR and a 16-inch rifle, both with 1:8 twist barrels. The testing includes initial stabilization checks, velocity measurements, and detailed analysis of group sizes and performance to identify optimal loads for subsonic velocities around 1050 ft/s. The instructor also compares the performance of handloads against factory DT Tactical ammunition.













