Thread: Trouble getting 300 Blackout to shoot and cycle subs

Originally Posted by R93

I don't think you have a spring strength issue. More of a timing issue due to how slow the carrier is due to gas.
As dogmatix suggested get an adjustable gas block first.
It will allow you to balance individual loads whether subs or full and might well be all you need to resolve the issue.



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I would expect you might need to enlarge the gas port hole AND fit the adjustable gas block (so when you shoot the supersonics you don't "over-gas"), because if it wont cycle properly with all the gas it has now cuttinggas flow down wont help. ARs are generally over-gassed anyway for reliability