It it a well made active reload mechanic, with the same UI and usage of shooting on a range.
I really like how the active reload mechanic is a core part of the gameplay, how you need to be executing the active reload properly to progress in the game as the enemy spawns faster than you can shoot without the active reload. Though it is a bit vague whether or not you hit it properly.
You can add a simple effect for the regular active reload vs the sweet spot reload would go a long way for the player to understand if they completed the timing challenge of the active reload.