Ok the specs-

8" CMMG 300BLK barrel, gas port is .098 and is aligned, system is pistol length. Suppressor is a Liberty Mystic.

My loads are 220gr bullet with 7.7 to 8.5 grs of Lilgun.

It will cycle with the Gemtech 187gr ammo, but will not on my loads.

It is short stroking, with 3 different weight buffers. Standard Car, h2 and h3. I have a H buffer in route. Ejects but will not pick up a new round. It's acting like it's under gassed, but runs fine with the Gemtech.

I'm baffled. Ideals?

Eta-I bumped up the charge to 9.0. Cycled fine, almost locked back on an empty mag.

Opened the gas port up, had to up the charge to 9.0. When I did that, it cycled 100%.

I have some other powder coming...maybe that will work better.

That's what I keep reading, but if I wanna run subs, it seems to be the trick.

I got 2 eight pound jugs coming.

It runs at 9.0grs of Lilgun, I just want something a tad bit quieter, if that is possible.