CCI Subsonic, .22LR, LHP, 40 Grain, 100 Rounds is rated 5.0 out of 5 by 1.
Rated 5 out of 5 by Mobuck from Believe this or don'tShooting this ammo through a suppressed Ruger 22/45 w/4" barrel and a FastFire using a sandbag rest allows consistent hits on an 8" round gong at 100 yards. Most hits are grouped in a 4" area. I don't have a db meter but this is also one of the quieter sub-sonics. The HP does actually mushroom on critters at close range.