Loaded up 100 rounds of subsonic 308. Trailboss powder and Sierra 175 Matchkings. Almost as quiet as a suppressed 22 lr. Shooting them through a 18.5 inch barrel and Thunderbeast 338BA can.

And then... got back to the grind of converting a couple 5 gallon buckets of 5.56 brass into 300 Whisper/Blackout for a buddy.