Start position is standing in either box, facing downrange, handgun loaded in holster, hands at sides. On start signal engage T1&2 from the left box with 2 rounds each. Perform a mandatory reload on the way to the right box where you will engage T3&4 with 2 rounds each.
Try to focus on getting that reload done within the first step of movement. Alternate starting position.
In between each rep, perform 2 reloads. Half-speed. See the magazine go in to the gun.