Amac,

Agreed, lets start some 'talkin'. Dummy rounds are a huge help. I've got dummy 9mm,5.56,& 12 gauge. I just finished practicing reloads on all 3 a couple of hours ago. If you can, order a bunch. If you practice malf drills it becomes a pain if you only have, say 3-4. Tap rack a few times and there you go again stripping a mag and reloading dummies. There are 2 types I have. Aluminum and steel cased shells with plastic bullets. The aluminium is great for dry firing but the extractor and feedramps chew them to pieces after awhile. The steel cased ones I have (I actually bought them from Jack @ elite) last much longer and are much cheaper. The downside is that there is a recess where the primer is and I don't think my M&P9's firing pin is having anything to strike against. The aluminum ones are struck by the firing pin and it is very discernable by the difference in sound.
Oh and I saw that malfunction with your AR bud. Not pretty!!