Are you looking for sub sonic? I have a 10.5" SBR 300blk with a Liberty suppressor. I load and shoot the 150 gr fmjbt in it consistently. And added note if you blow your suppressor apart as long as the main body stays in 1 piece they will repair it. Ask me how I know. Blew the guts out of an AAC. Sent it back 3 weeks later back on the rifle. Blew out the face of my Liberty and they did the same. Shit happens.