Several before/after experiments have been performed, but they all have one flaw. It's extremely difficult to visualize what is going on with the flow-fields of the weapon blasts during the time of firing.
We planned and assembled several different assets including a high speed camera over a few months and then ran a test designed specifically to allow the viewer to observe the gas dynamics in great detail!
Needless to say, this was a blast. Well, two blasts if you want to be technical about it (and we usually do).
I performed an experiment to see what the differences were between semi-automatic pistols and revolvers. The advantage of shooting under water is that you can see the boundary of the gas flow fields almost perfectly.
Instead of saving for my kids' college, I make videos using the money I would have saved. The thought is it will help educate the world as a whole, and one day generate enough revenue to pay for their education. Until then if you appreciate what you've learned in this video and the effort that went in to it, please share the video. If you REALLY liked it, feel free to pitch a few dollars towards their college fund by clicking here: http://bit.ly/KidsCollege