Basically you put your reg really low. Shoot, shoot, shoot, raise the reg, shoot, shoot, shoot, raise the reg.
etc. etc. until your FPS stops going up and starts going down. Now you back up a little bit and find the "sweet spot" where it didn't go up or down, where it just plateau's
Make sure you shoot enough shots to actually register the adjustment in the reg. Some regs take 3-4 shots to clear out and give you the new adjusted pressure
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