I say you try the following:
1. Holster your weapon;
2. Leave the range;
3. Run as fast as you can around the outside of the range, (or anything else to get your heart rate going and your ADRENALINE flowing);
4. Return to the range;
5. Without stopping to catch your breath or wait for your heart to slow down, run a 2+1 drill, reload, and run another 2+1 drill.
This will give you a better idea of how you might shoot under stress, which is a whole lot different than slowly popping rounds off and trying to compare that to real life situations. Slow practice is great because it helps you develop proper technique and muscle memory, but don't make the mistake of confusing what its like to slowly pop off rounds with what its like to defend yourself. Most likely, you will be amped, somewhat shaky, and in a bit of a fog.
Work on getting back to center of mass while shooting slow, then start adding some physical/mental stress to your practice.
Other than exercise to pump up your adrenaline, try having a range buddy put a couple of dummy rounds in your magazine (without telling you where they are). When you encounter a dummy, your job is to clear it, and get back to shooting.
Once you can do this, find a range that has areas where you can move around while shooting. Start running two shot drills. In between shots, MOVE, (preferably from side to side rather than forward and back). Once you get comfortable with this, throw the dummy rounds back into the mix. While you are clearing your jam, you must be moving.
You can also try drills where you begin in the 7 foot range, unholster, fire two shots on target, move to cover and resume firing.