The Aguila Super Colibri’s work great, at least, under 15-20 yards. You’d need to try them to see if 30 yards is a stretch.
I have tried both the colibri and the Super colibri. The Super seems just as quiet, but has less chance of getting stuck in the barrel, and more oomph.
They have more of a “click” sound, while the CCI CB’s sound more like a nail gun or pellet rifle.
