my new to me hunter carbine .22 shot well but was "twangy".i wanted to quiet it down so I bought a donnyfl moderator and adapter.adding the moderator it was hard go say if it was quieter.there was just so much spring noise.i tore it down and added maccari tar to the spring center and Honda moly to other areas.the difference was amazing.it just "thuds" and when the moderator is on it is noticeable how it just takes off the last bit of bark
and it shoots as good as ever
at 50 yards with cheap Wal-Mart tin crosman. 22 hp ammo groups are under inch quite often.
Attachment 235150
Attachment 235151