On paper and in some chrono's WWB shows to be a little hotter. But over the years and again last week i had more problems with WWB ammo than Federal champion in both 40 and 9.. Last week 100 rds Fed champion 9mm shot just fine. 100 rds of WWB 9mm had 7 malfunctions. Those 7 rds were too weak to cycle the next rd.. Could feel and hear the difference. This is about the fourth instance with WWB. Yes i had many good range trips with WWB but they do have some QC issues.