Your concern is heartwarming.
No, the 6.8 isn't subsonic as you already know since you shoot a variant yourself.
Do I wear hearing protection when I'm shooting my AR?
Do I wear when I'm shooting my Browning Boss in .300?
As a matter of fact, Yes.
The range I shoot at goes out to 900 yards when they get around to mowing it in a rural setting with no covered structures and once again my little 6.8 in these conditions doesn't require Ears on.
I've been a collector and shooter for close to 30 years and have hunted Australia and North America.
Save the sarcasm for someone else.
