Heavy Gunner (Fallout 4)

Heavy Gunner is a perk in Fallout 4.

Effects
The Heavy Gunner perk increases the damage dealt by heavy weapons such as miniguns, missile launchers, Fat Man, etc.

Affected weapons

 * Minigun
 * Gatling laser
 * Missile launcher
 * Fat Man
 * Cryolator
 * Flamer
 * Broadsider
 * Junk Jet

Bugs

 * Heavy gunner currently affects the bonus explosive damage of the legendary Explosive prefix. This allows an explosive minigun, for example, to do 76 damage per shot with both heavy gunner and demolition expert, as the base 8 is doubled by HG, but the explosive 15 is doubled by DE and again by HG, doing 16 ballistic and 60 explosive damage.  This is likely a bug as Gunslinger (pistols), Commando (automatics), and Rifleman (rifles) do not affect the explosive bonus damage. (PC)
 * Heavy gunner affecting the bonus explosive damage of the legendary Explosive prefix is actually not a bug. All heavy weapons such as Fat Man's damage is split into two parts：impact damage and explosive damage. Heavy gunner perk double them both. The impact damage however is quit minor. If heavy gunner affects only the impact damage, it will make the perk useless on almost every heavy weapons. (PC)