Viht N110 is quiet for subsonic 300 blackouts. Great for single shots and bolt actions. It was not 100% reliable cycling my noveske AR. I finally got my hands on AA 1680 which is what I now use reloading subsonic 300 Blackout.
Gemtech subsonic 22 LR ammo works great in my HK 22 AR cycles everytime. Also cycles my Colt 1911 22LR and of course quiet. Stupid quiet on my contender. I use my Silencerco Sparrow suppressor on all my 22 rifles.
