Good point on the ‘quiet loads’ ... I build ARs and they are very easy to attach suppressors to, but the super sonic rounds are never ‘soft’. I have a CMMG conversion kit which when used with a suppressor would be very ‘soft’, especially with 60 grain Aguila rounds. I have a garage range for .22 calibers and the 60 grain subs run just fine in the latest (impingement) build I did. Haven’t tried them in the Piston ARs I have though.
I have been thinking about a .300 BLK just because I like the idea of a round that is designed to work well subsonic and supersonic.
I have been hoping for prices to drop back down...