damn it works!
sooo, reballs test give few results
( 1.air efficiency go down dramatically - 3 feeders (app 550 reballs) for 1k psi (68ci) and 2.sound signature became a bit noticeable (also I blew out bolt pillow on dry firing)))
chrono +-3 on reballs is not bad and kick gone completely
hpr goes lower - unscrewed hpr reg for more than 3/4 of turn and! damn it shot darts now
jfi: current dwell is 6 and lpr is 70psi. chrono: 280,277,282,281,283,280
for this 'darts' filling its not high price for me with air efficiency. coz snapping from 2-3 balls better than showering by 1-2 pods
on weekend will test with paint. on humans. sorry)