Matt, got your lazy *** on this one.
Alright, here are step by step (with pics) instructions to adjust your pressure on your stcok LPR. Props to Matt for pics and steps.
Flat tipped screw driver
Remove the LP hose and take the LPR off the gun with an adjustable wrench.
Remove the big brass screw that holds the LPR on the front block.
After taking off the brass screw, you should see a silver screw in the body of the LPR. Behind it is a spring for the tension.
This is the harder step. This is where the adjusting begins. First of all you will not get the right pressure on your first try so don't expect to. This will require time and experimenting. As you turn IN the silver screw the psi get LOWER, out makes it higher.
You should start out with the screw almost all the way in. Re-assemble the reg, put it back on and see if it cocks. If it dosent(which it probably wont) take it back off and follow steps 1-3 again. Then screw it out more. You want to put it back on to test it after every adjustment. Do those steps over and over until you have your cocker cocking everytime consistantly. With the WGP I would suggest after you get it set, screw it out about a 1/4 a turn and you are set.
Put it all back together and put it on your gun. Go have a blast and you should now be pinching balls instead of chopping.