I went with the Wolff kit also. Ordered through Midway and have not been disapointed. The springs are high quality materials and are easy to swap. For a recoil spring I really enjoy my firedragon dual recoil buffer spring. It works well between hot and cold loads.
Thanks for the info...what weight recoil spring should I look for between +P and +P+ loads. Also did the stiffer firing pin spring improve the accuracy of the gun? I haven't done a spring job before, and not sure what to expect.
I noticed more of a difference from the hammer spring and the recoil buffer spring. The only difference I noticed with a firing pin spring swap was a more dead center hit on the primers. Which probably means the anvil strike was cleaner giving better ignition. But I shoot from a standing postition and really didnt notice much change in accuracy at 15 to 20 yards from the pin spring swap.