[dtpbmasta]

ok i got a t8.1 i air it up with co2 shoots fine until i stop shooting then it puffs out the velocity screw hole a couple times my next shot is super hot and hard almost 350+ then the bolt will start moving and its like the marker is trying to shoot but not shoot and after that i have to remove mag to make it stop but inserting another mag the marker does the same thing i have tried adjusting the velocity all the way down then back up to 270 and still does it what is causing this problem.