Earth Defense Force: Insect Armageddon features an active reload system. You may use this ability by pressing the reload button ( for 360 users or for PS3 users) while the reload indicator is in the white section at the center of the reload bar. Failure to press the button at the correct moment will result in a slower reload while a perfect reload will cut your reload time in half.
All weapons that are able to be actively reloaded give you the same amount of time to achieve a successful active reload. However, since there is a large amount of variation in reload times, the short period for actively reloading will look very small on some weapons and much larger on others. There are some weapons that do not allow an active reload. For example the Pesticide weapons and Air Tortoise cannot be actively reloaded and any attempt to do so will result in a slower reload time.