Ummm, what are your qualifications?
I don't mean to be critical, but I see a lot wrong with that.
As a "drill" it has:
A draw
Repetitive shooting on a single target
Movement (which always includes launching from the position, arriving and settling into position and in this case "dismounting" and "mounting" the gun)
A reload
What is doesn't have (and is NOT required to have):
Transitions/Multiple targets
Varying distances
Varying heights
Varying difficulty/danger/risk (related to distance, but also includes no-shoots, hard-cover, overlapping targets)
What it doesn't have and probable should:
A standardize target
A means to grading performance
As a "drill" it's fine.
Your "background and qualifications" are irrelevant since an utter retard can come up with an acceptable drill and some might say a few have.