New spring for sure. I have shot Hornady XTP, Speer GD in both 115gr and 124gr with no problems, and as far as Federal Hydra Shoks, I've gone through 2 boxes of the 135gr Low Recoil all with no problems. WWB is great for the range. I did have 2 light primer strikes when new using some cheap Magtech ammo, but won't use it again.
Get spare springs. You can see the difference after 200+rds in the length of old and new.