The best thing I ever did, was to shoot several hundred rounds of twenty-two ammunition offhand at a spinner one afternoon many years ago.
It all started with a Columbian Mauser converted by the Israelis to 7.62 x 52 NATO (308
So needless to say I also learned to flinch. The anticipation was almost as bad. I even flinched subconsciously when I pulled the trigger of my airgun. As I got older I knew I was a flincher but didn’t know how to overcome it. I could will myself to stillness, but I either pulled the trigger, or momentarily closed my eyes.
After consideration, I figured that I was mentally occupied with the game at hand, and did not anticipate the recoil because first of all there was so little to contend with, and secondly I was focused on the target or targets. I went home to experiment. I bought a couple of bricks of 22LR, an extra magazine for the Ruger 10/22, and a spinner target with a one inch target. My Ruger has a Volkstrum trigger that I bought through Brownells and is the only modification I have made to it.
When it was time to teach my wife to shoot with her S&W 908, I bought a case of ammo, and three extra magazines. When we went to the range, I brought my bull barreled Mark II, two magazines, a brick of .22 ammo, and the Smith and Wesson. We fired the Ruger until she was warmed up and comfortable shooting. Cristal is an old hand with the Mark II, having one of her own before I even met her. Anything that comes within her sights is apt to be ventilated, so I would think twice before challenging her to a gunfight.
The S&W is a nicely made compact 9mm. I am not a fan of the 9mm and my personal self defense gun is a Colt 1911 in 45 auto. But she needed a compact firearm with good capacity, and the 908 fit the bill. At the range, I filled up the four mags, and told her to point it down range and fire one round every two to three seconds until the slide locked. Drop the empty magazine, put another one in, and do it again; and again, until she went through all four magazines. By the third magazine she was in control of the weapon, and by the end of the session later that day, my thumb was raw from shoving 9mm rounds into the mags, and she was making two inch holes in the cardboard backing of the targets at 21 feet, just because she could.
I am going to remove the grips tonight and see if I can garner any more information. I downloaded the manual from the S&W website, maybe there are some clues in there.)