Charged Scatter Grenades appear to be doing on average around 30% less damage than their uncharged version. Taken from the reddit post: "For testing I did 10 trials for each grenade on Kalli with Echo of Undermining: Charged Grenades: Trial 1: 20,367 Trial 2: 17,822 Trial 3: 19,093 Trial 4: 18,892 Trial 5: 16,648 Trial 6: 20,828 Trial 7: 17,422 Trial 8: 20,592 Trial 9: 17,163 Trial 10: 18,753 Average Damage: 18,758 Uncharged Grenades: Trial 1: 26,244 Trial 2: 26,393 Trial 3: 24,340 Trial 4: 25,150 Trial 5: 25,421 Trial 6: 26,186 Trial 7: 24,953 Trial 8: 26,644 Trial 9: 25,710 Trial 10: 24,883 Average Damage: 25,592"