Dummy ability help?

Two questions:

First, for my "load weapon" trigger, I need a "Left-Click to Use" ability that has no effect except to start the trigger - are any in particular good, or can I simply replace all the data from one for my needs?

Second, the trigger synopsis:
Event Hero begins casting [trigger dummy Item ability].
Condition Hero possesses both an Unloaded Weapon and an Ammo Clip
Actions Remove Unloaded Weapon, Remove 1 Ammo Clip, Create 1 Loaded Weapon/Give it to the triggering Hero

Is that okay? (Other possibility is giving it to the Hero as a non-Hero ability ...)

The best dummy ability is channel. It does nothing, has a lot of settings and you can even have several abilities based on channel on the same hero (there is a setting that allows to set the base spell used).