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.
Yes it is. 'Specially in a Noveske! 220gr SMK's, 11.2gr AA1680, 1025fps.
The target makes more noise on impact.
Enough to warrant a slight pudgy. d;^)