Thread: Subsonic 22lr going supersonic?

Just went and pulled out the box of CCI I've been having supersonic shots from. Thought maybe they were standard velocity, but no they are subsonics. I've always assumed it's because I have a 25 inch barrel meaning the posted 1050 fps hovers closer to the sound barrier. But after hearing your experience I'm wondering since it's never been an issue before.

Had also entertained the idea of the first few shots being do to obstructions in the barrel from never cleaning the thing. But like yourself will experience a few shots with no problem then randomly have a crack.

one of the numbers on the side is A29U18, possibly a batch number I don't know.

Poor QC could be an issue, but still accurate in my rifle.