The "spike" at 110 bar is when it's coming off the reg , the gun settings you've got at the moment are working at their most efficient meanjng the reg is set a touch too high you get a few higher power shots then it drops right off.
Turn it down just a very small amount then do another string and see what that gives you. When you get a flat string you're at optimum reg pressure then you can start altering the other bits to get the power you want from that reg pressure