Got .22 about a month ago. If I fill to 300 bar I get four good 8 shot mags and it seemed to drop off the regulator around shot 36; shot 40 came in 2 inches low at 791fps vs the avg of 837fps. Starting at 300 bar at the end of mag 1 was at 250 bar, end of mag 2 was at 210 bar, end of mag 3 was at 170 bar, end of mag 4 was 140 bar, and end of mag 5 was at 100 bar.
Starting with a 250 bar fill over 24 shots the avg velocity was 836fps with a spread of 13fps and standard deviation of 2.9fps (over the first 16 shots it was 9fps and std 2.4)
All is as delivered .22 short shooting 18g JSBs using a Labradar.