Rob those are great drills, especially the 1 handed techniques, most ranges won't allow that anymore ( unfortunately ) and also bucks the rear sights that are currently very popular because the are dehorned, but in the wrong direction, most sight makers slope the front of the rear sight, and you don't have that very useful ledge to work against the belt or the shoe. Most factory rear sights do.
Get a buddy to load your mags for you alternating live rounds, empty brass or dummies, then do the same for them, very good drills.