Just a word to add to the high cap and leo mags, just because you load you first mag with 11 is fine , I do that all the time, here is the kicker, the only time you cant start with that 11 round mag is if at the buzzer your gun starts unloaded by course design, and then after the buzzer you load and shoot.
This is to emulate that no mag will have more than ten rounds in any division.