We do not build-in time for picking-up spent brass, but if there is any spare time between stages, it can be done. I usually wait until the match is over, and can still get most of my brass. In my area, even as brass gets more and more expensive, a lot of shooters of .40 and 9mm seem to just try to find the best deal on brass, rather than pick it up. When I started shooting, over ten years ago now, it was as normal to have your squad mates pick your brass for you, as it was for them to tape targets, but I rarely ever see that, now.