Were you using standard loads when you shot it? Compared to a Rifle without, just how much would you say it suppressed the report?
Standard loads. Quite a bit of difference!! I would say that the noise is reduced @ 60% give or take.
No hearing protection necessary.
FYI, if you ever get a chance to shoot a SBR with a suppressor with 300 Blackouts, do it. Dang,,, almoooossst close to quiet. That is my next desired setup.