Sortie Velocities

I have finally gotten my 0.22 and 0.25 Sortie to work properly by (1) adjusting the hammer spring (2) adjusting the muzzle end cap and (3) removing the heavy grease from the reloading gear assembly. The question is when to stop adjusting the hammer spring. I am asking Sortie owners what velocities are they getting with what weight pellet so I will know when to stop adjustments. 
 
Ehhh mine has to overcome moderator backpressire (and has some mods to do so) I have to run mine at ~680 in 22 cal

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