Hitting at least 3 enemies with an attack, increases your damage by 24-36% for 3 seconds.
2.5-4% Bonus Critical Chance on Chained Hit. Stacks 5 times.
4.25-5% Strength for every Enemy you Stagger. Stacks 5 times.
3.5-5% Critical Chance for every 10% of magazine spent during continuous fire. Stacks 5 times.
Maybe Puncture is better on Bolter? I have not done the number crunching.
Third Curio Perk can be:
- Revive Speed (my personal choice)- Gunner Resistance