.300 Blk-out Subs

Anyone running sub-sonics in their .300 blk-out ?

I picked up some 150gr and found some 220gr round nose bullets to try. Would love to have some 200's but haven't been able to find any locally.

Bump.

Got some 220's loaded and will try to make it to the range soon.

I made it to the range. I used 4227 for powder and got my sub-sonic's at about 10.6gr of powder. There was a bit of a cycling problem, I may have to seat the bullets a bit deeper to allow them to be extracted out of the magazine a bit easier. Or go with a softer spring.
Do you guys know which spring would allow me to go a bit softer/easier to recoil?
Not sure which I have know, have to dig into my receipts......

I believe the gas system is fine, I'm also running a can on the front of a 16" barrel. So with a can on it, it has additional back pressure.
I think I may need a lighter spring, so that it will cycle easier. But with that said, when I go back to full house loads of 25grs of 1680 will it cycle to hard (is this bad)?  May just have to load a few of everything and give it a try.

This is actually my 7.62x40 Wilson Tactical gun but it is almost Identical to the 300blk except that the case is a bit longer to allow more powder in it.