FX Crown question

I have searched and have not seen this testing anywhere. For the adjustability of the crown, with the transfer port, power adjuster and reg pressure, where does a 22 cal crown max out on energy with the JSB Beast jumbos? Also, how accurate are these pellets in a 22 cal crown? Most guys testing with other pellets don’t even list the reg pressure. Assuming the highest velocities will be at the 150 bar max reg pressure.
 
I believe most people does not adjust theire guns for highest possible velocity, as it often leads to bad accuracy, and high air usage.

That is why you probably doeas not find post of other people doing it. What you normally find is how accurate owners of theire guns get them to shoot at a certain distance, with a pellet they find to be accurate, at the most accurate speed. It seems the jsb 18 grain pellets are the one many use to tune theire gun for.