Originally Posted by Atekhed
While the BB is more of a hinderance/detriment to training, 10 round magazines are not as much. You'll get more practice reloading if nothing else which isn't all bad. Just bring more 10 round mags to the course loaded and ready to go to keep things moving.
There is a lot to be said for this approach. Becoming better at the non-shooting skills (reloads, movement, transitions, getting in/out of positions) will make you a better overall shooter.