Up to 5-20% Strength based on the charge time of your heavy attacks. Stacks 3 times.
Target receives 1-4 Stack(s) of 10% Damage if already Staggered. Lasts 5s.
18-30% Strength for 5s when every pellet in a shot hits the same enemy.
5-8% Strength for every shot fired during continuous fire. Stacks 5 times.