BCM 9" 300 blackout
MVB PDW stock kit
Dead Air Sandman L suppressor
Will cycle all of the following rounds but will not lock back on final round
1. 110 gr. barnes tac tx bullet supersonic load with each of the following powder loads ...
- 17.5gr, 18.2gr, 19.2gr, 19.6gr 20.0gr (all Lil Gun powder with Top Brass brass and Winchester WSR primers)
2. Remington 220gr subsonic factory ammo
3. Remington 110 gr super sonic ammo
My questions surround the following possibilities ...
a. This is a PDW stock issue and I should ditch the idea
b. This is a spring issue
c. This is a buffer weight issue
d. The reloads I made pretty much span the range of powder charges for supersonic 300 BLK but is it possible it needs to be hotter? (Top recommended charge per Hodgdon powder 21.0 gr. for this particular load)
Thanks for any help.
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