I"ve been extensively trained to fire, drop a magazine, reload and continue to hit the target while moving. Anybody can get Magpuls' video's on transition shooting and do the same, dry fire, switch mags etc. I've done on both military and private ranges. If I was going to shoot up a mall, even with 10 rd mags, I'd practice. I'd have 10...10 rnd mags and just do it until I could do it in my sleep.....anybody can do that. The mags make no difference. Incidently alot of us spent a ton of time buying or trying to buy mags today. Everybody is sold out. This sucks. I'm sending my wife out to pick up another AR and rounds. 5.56 has shot up 20 bucks or more if you can find it.