I'd not question their use with subsonics or low pressure loads, I have one on a rifle I use to euthanase animals (amoungst other things) and its good for that, the folks whose horse/cattlebeast etc is being put down are not upset, and the neighbours don't know! Its not subsonic but only makes a soft "boommmff".
However in full power mode, the reduction is imperceptible to me at the blunt end, and as we found in the tests, makes next to no difference some distance away.
I don't drink Koolaid - no matter what sort of flavour or can it comes in!
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