A sly payload added to your shots make for a rather destructive addition.
Prerequisite(s): Sniper Shot, BAB +5.
BENEFIT
At 10 TP or more, you may spend all TP to deliver a special firearm attack that takes the place of an attack in a full-attack or just a single attack. This attack deals normal damage, and lodges a payload into the target. This payload is delayed for 1 round and will explode for 1d6 fire damage. Successful ranged or melee attacks against the target increase the amount of damage the payload deals by +1d6, reaching a maximum of 3d6 fire damage. When the payload reaches the maximum amount of damage, it will immediately explode. This only affects the target. At 20 TP or more, you may spend all TP to lodge a payload that is delayed for 2 rounds, starting at 1d6 fire damage, increasing by + 1d6, to a maximum of 6d6 fire damage. At 30 TP or more, you may spend all TP to lodge a payload that is delayed for 3 rounds, starting at 1d6 fire damage, increasing by + 1d6, to a maximum of 9d6 fire damage.