If you re-load you need to try some different loads to see what works best in your rifle. A lot of folks use adjustable gas blocks on the 300 Blackout in able to shoot both sonic and sub sonic rounds. I am fortunate in that my 16" shoots both sonic and subsonic with a fixed gas block but apparently there is a huge variation in makes. If all else fails try 300blktalk.com where the constant 300 users hide out. Have you tried any sonic loads yet?
|