For one, it shows the MagnitoSpeed chronograph. That's cool !

For two, it shows some neat graph of powder loads. I had wondered if FPS was linear over the range of min to max given in the data books. Apparently it is fairly linear at least for the powders used in this video.

The magnitospeed makes it pretty easy to do these kind of graphs with the iPhone or iPad connection. Would like to see more powders tested like this!

300 Blk - 225gr Hornady BTHP Match subsonics - YouTube