Update September 8th:
Took the P-01 to the range with my newly installed #15 lb Hammer Spring. I fired about 250-300 rounds with ZERO issues. After having 3-4 lite strikes per outing, this was more satisfying that I thought it would be. I purposefully used LAX RELOADED Ammo and Freedom Munitions ammo for the most part since I had some issues with those previously. Zero issues.
I "think" I can feel that the DA pull is slightly stiffer with the #15 vs the #13. But, it is still super smooth. Andrew at CGW tested the trigger and it was DA = 7lbs-12oz vs 7lbs-5oz (about 1/2 lb more). SA was virtually the same going from 3.8 to 3.9.
Thanks for the advice and comments. Hope this thread helps someone else down the road. It's an interesting situation. CGW fully stands by their #13lb hammer spring with thousand and thousands of CZ's running with it successfully. For some reason mine wasn't. I didn't ask them to put the #15 in, but they suggested we try it. So far, it seems to be the right solution for my P-01.
*By the way, I'm not sure why this was moved out of the Cajun Gun Works forum into the Ammunition forum. I had ammunition issues, but due to the issues occurring with numerous brands of ammo, the solution was with the gun/pro-kit etc. I think this is more useful as a discussion in the CGW thread...