Finally broken the sound barrier with my standard AA 410.
I bought pellets for the CO2 pistol, orange plastic jobbies with a metal insert 5,7g made in USA, and decided to test the accuracy at longer range.
The first shot broke the sound barrier and the pellets were flying all over the place. Closed the power to sub 12ft/lbs (with aa's) but accuracy was still bad.
At 15 m they group into 30mm.
At 30 m 2 out of ten pellets hit the A4 paper.
Great to hear a pellet break the sound barrier!