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Suppressors Silencerco omega 300 on a DPMS .308 is jamming up on ejecting

Too much pressure and the bolt is closing too fast on the brass trying to eject maybe. Fix would be heavy buffer springs/weight and/or adjustable gas block. I needed an adjustable block on my AR10 I built a while back for suppressor use.
 
Just like what Ravenyzf-r6 said. The spent casing is bouncing around inside the upper receiver because the bcg is moving faster than ejecting.

Adjustable gas blocks help, heavier buffer or a quality buffer spring for suppressor use is the route you need to go to slow it down.

A lot depends on your current set up also. Gas length, factory block, type of buffer you are using (rifle or carbine). Just a start for you to consider.
 
Just like what Ravenyzf-r6 said. The spent casing is bouncing around inside the upper receiver because the bcg is moving faster than ejecting.

Adjustable gas blocks help, heavier buffer or a quality buffer spring for suppressor use is the route you need to go to slow it down.

A lot depends on your current set up also. Gas length, factory block, type of buffer you are using (rifle or carbine). Just a start for you to consider.
Thanks y'all i got a heavier buffer from Spikes Tactical and see what happens thanks again for your advice
 
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Had the same issues with my ar10. I have the tuned JP silent captured spring and weight set with a JP adjustable gas block. you may need to settle on the load for the rifle, then go about tuning it to that load. that'll give you the best performance. I found that, with full power 308 loads, the gas block is at least 50% shut off when using the can. I've got it tuned to the point where is just cycles cleanly with the can off, so that the can on performance is right where it needs to be.