In the interest of time and space, we're keeping psionic deeds to 2 for Psionics Expanded. We're already closing in on 50 pages for Hidden Intentions and getting near the end of the playtesting cycle, so we're trying to avoid adding too much new material that will delay the project.

Psionic Deeds
The deeds below may be selected by any gunner or any other character who can access deeds and that is of the psionic subtype, including the gunner archetype.

Explosive Shot (Su): At 1st level, when the gunslinger makes a ranged attack with a firearm, she can spend 1 grit point and have the attack deal splash damage to all creatures within a 5 ft. radius of the creature struck. Splash damage from explosive shot is always equal to the attack’s minimum damage. Alternatively, the gunslinger can spend 2 grit points to have the radius of the effect be 10 ft. instead of 5 ft. If the attack misses, the effect is wasted.

Energized Ammunition (Su): At 11th level, when the gunslinger makes a ranged attack with a firearm, she can spend 1 grit point as a free action to change the damage of the attack to her active energy type.

Looks good, with signature deed these would rule

I really like both of these. I'd be all over explosive shot. I don't think it's overpowered, but for flavor, I just couldn't ignore it.