Finally have the gun setup where its running reliable, with all the powders and subsonic. Using GAS system, using Brownells lightweight chromoly BCG, and -20% Buffer spring. Locks bolt back with even 900 FPS.
@ 50 yards
LT-30, and its early, looks like the GO TO powder for subsonic 300 BLK.
CFE BLK is ideal for getting the gun to run well. N130 good too.
N130 when you go around..over 12.0 you have slightly compressed loads, but no big deal at all. Load to like 2.090 and its fine.
Finding the loads...
With near 10" barrel here....and a regular gas system, LT-30 is looking like the winner here at around 12.5 grains. Super good.
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