Taipan Veteran Regulator Adjustment Question

If memory serves correctly, each notch or hole is about 2 bar on average. The thing is, this reg adjusts in a different way than most do. You are adjusting the spring tension directly and not the Delrin cut-off seal’s distance from the piston. With this said, adjusting spring tension in this way, as you do with the Taipan reg, there is no measurable incremental adjustments that each hole or notch represent. When lowing the tension, for example, the first few holes or notches may translate to 3 bar then the 3-4 hole 2 bar, 5th hole 1 bar and so on. I decreased pressure on a .22 Veteran Long’s reg 7 holes which translated to 14 bar. However, when adjusting back up, I found that each hole didn’t equal 2 bar but progressively created more pressure per hole of tension adjusted.

I hope that helps. Adjust and test is the only true way to know for sure. It’s an awesome regulator though. Have fun. 
 
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My velocity increased about 40 FPS when the pressure went below the regulator set point which was about 150 bar, then dropped dramatically after about 10 shots.

This is a symptom of having the regulator’s set point too high for the speed your hammer spring is set for. When all is set correctly, the the speed will remain fairly constant until it reaches the reg’s set point. From there, it will shoot a few more shots at this same speed and then begin dropping off speed for every shot there after. 
 
My velocity increased about 40 FPS when the pressure went below the regulator set point which was about 150 bar, then dropped dramatically after about 10 shots.

This is a symptom of having the regulator’s set point too high for the speed your hammer spring is set for. When all is set correctly, the the speed will remain fairly constant until it reaches the reg’s set point. From there, it will shoot a few more shots at this same speed and then begin dropping off speed for every shot there after.

That what I was thinking but wasn't sure. This is my second PCP but first that has a regulator. Was hoping it would settle down after shooting it some, the gun is brand new. Do regulators need to break in? Should I just shoot it for a while before attempting to adjust it?
 
My velocity increased about 40 FPS when the pressure went below the regulator set point which was about 150 bar, then dropped dramatically after about 10 shots.

This is a symptom of having the regulator’s set point too high for the speed your hammer spring is set for. When all is set correctly, the the speed will remain fairly constant until it reaches the reg’s set point. From there, it will shoot a few more shots at this same speed and then begin dropping off speed for every shot there after.

That what I was thinking but wasn't sure. This is my second PCP but first that has a regulator. Was hoping it would settle down after shooting it some, the gun is brand new. Do regulators need to break in? Should I just shoot it for a while before attempting to adjust it?

Regulators do have a break-in period. However, Taipans have commonly delivered with regs set too high. It’s not going to hurt anything if you keep shooting it this way but it’s not going to break-in and stop rising at the end of the string. Breaking-in usually results in a little higher fps per shot and less deviation between shots.

Being that the rise in fps happens as it leaves the regulator, you could just fill right before this happens and you would avoid it. With it adjusted correctly, you’ll get a few more shots.