Velocity goal

[Glocksecure]

What is your velocity goal? 1050 fps is below the speed of sound but is transonic. Do you aim for 1000fps and just deal with the higher ones making more noise, or do you try to go 975 so all of them are really quiet? Right now I am launching 220gr SMK 1029-1061fps over 20 rounds with 8.5 grains of Lil'gun. Most of them are transonic and making noise. I want quiet, but I want as much velocity as possible. Thanks for the help.