In addition to the questions Rex asked, will it strip a round from the magazine when manually cycling the rifle?
What lower parts kit did you use?
Most specifically, put up the weight of your buffer. It is likely 3.6 ounces or so and will likely need to be heavier.
This is a great thread to read to understand why buffer length and weight are important.
https://forum.308ar.com/topic/16799-gas-tubes-barrel-gas-ports-and-buffer-weight/