308 is 167 decibels. And with a good suppressor 133 decibels. So its still louder than a Rock Concert with a suppressor on it. NFA needs to go bye bye. It was made law by a bunch of men that have no clue about suppressors.
You would still need hearing protection with suppressors on high power rifles.
LOL, I have a lot of respect for you dad, but to think that a bunch of men that have no clue about suppressor are going to change the NFA is just funny.