Open guns have to be tuned to the load. You find a load you want to run then get the gun to run it by changing comps or recoil spring rates to get the gun to shoot flat. If you change the load you have to do it all over again.
In this case for the load there is to much comp, in that situation it will be very hard to get it to run at all. Up the powder charge to +P levels before you try to adjust the recoil spring rate or you will find the slide coming back to fast and a host of other problems.