Saint Victor FTE problem with suppressor

I bought a SAINT a while back for the sole purpose of shooting hogs at close range while suppressed. I have a Thunderbeast can because I read somewhere that they excelled at repeatability. I have to say that I have been a little bit disappointed. The. Firearm can be perfectly clean and I’m lucky if I can get back to back shots without a failure to eject. Also, the accuracy is noticeably worse. I’m shooting hornady TAP 168 grain. Any advice on an adjustable gas block? Or is this a bad setup for my application?