Anyone try Shooters World, Buffalo Rifle?

I have been using Unique behind a 410 gr Hornady Sub-X. It’s pretty quiet w the Hybrid 46, but nothing like a 300 BLK with 4227 or H110 and an Omega. That gun is insane how quiet it is.

I got an email reply from Shooters World saying you can safely use Buffalo Rifle at reduced loads. Kind of like Trail Boss.

Anyone try it?