For loading a 22-round .45 ACP Uzi Pro magazine:
(1) Hold the magazine in your non-dominant hand, with the back of the magazine facing up and the follower at the bottom.
(2) Take a .45 ACP round and place it on top of the follower, ensuring that the bullet is facing forward (toward the front of the magazine).
(3) Apply slight pressure to the round and push it down until it is fully seated in the magazine, and the next round can be loaded on top of it.
(4) Repeat this process until you've loaded all 22 rounds, or until the magazine is full. Make sure to press down on each round to ensure it is properly seated.
(5) Once you've loaded the magazine, you may want to give it a light tap on a hard surface to ensure that the rounds are seated correctly and the magazine is fully loaded.