I'm not sure Hellfire and Disintegrate really combine all that well. I think the Aggravated damage from Hellfire can accomplish most of what Disintegrate can. Maybe they could work in tandem? Disintegrate gets rid of anything in front of the shot, until it encounters living matter (which Disintegrate doesn't affect), where-upon the shot deals Aggravated Damage (as normal for Hellfire). But that's just two separate, sequential uses, rather than a fusion of two powers.
Name: Normality Rounds
Type: Embeded (Going Native), One-Shot[, Near-Field?]
Activation: Whispering "Only Human", to the rounds before firing.
Appearance: Standard for ammunition of their type, except for the scratching that resembles Da Vinci's Vitruivian Man on their casings.
Effect: When a supernatural, human-like (or at least, human-seeming) being is stuck by these rounds, they find themselves severed from their supernatural powers, as if they were only the human they appeared to be.