Anyone experienced with a mac 1 tuned dicovery? I'm only getting 12 shots from 2000psi-1000psi. Tried backing out the power adjuster 6 full turns and only got up to 15. As set by Tim, accuracy was best shots 2-5. I've been testing jsb 18.1 dome, 14.3 dome & 15.? pointed and 22 or 23gr . Benjamin...