This drill is awesome. In isolated drill with a strong hand(or we can’t only) is an excellent way to train your trigger control. As noted in the video, it is import to train at speed. That is, don’t use time as a crutch but break a shot as quickly as possible. When we execute at speed, deficiencies unearth.
Of course get a lot of reps with your SIRT in between live fire drills. You can also go at the same time on the range with the SIRT.