Well, the photo/link was just for illustrative purposes. I suggest the use of snap caps in any dry-fire exercise regardless of caliber.
Yeah I figured, and then the thought struck me as to "are there some for 22LR"?
Dry firing is a great way to smooth out your movement, trigger pull, etc. (and not shoot yourself)
But don't think it helps in hitting the target. For instance:
I have a 30 foot practice range in my back yard. That's the distance from my front door to my back door. I can sit and bullseye targets all day, with any of my pistols.
However, a week or so ago, my dog on our nightly "checking the perimeter" walk (so he can empty his bladder) he treed a Copperhead snake. It was 9:00 PM - meaning dark
Copperhead's are usually a slender snake, and in this case due to surrounding back ground, I needed to shoot him in a right to left position, instead of stretching out long ways in front of me.
I wanted to take the shot just out of striking distance so around 10 feet. Making the point of impact different than at 30 feet for which the pistol was sighted for.
Being mindful of that fact, and at night with a flashlight, AND the most important one of all, if he moved in my direction I would have to move, and move quickly.
Took 8 shots. 3rd shot grazed him, kill shot was No. 8. A defender bullet in a 9MM and the only thing left at the kill shot was skin down the sides, holding the upper to the lower body.
And I'm not a bad shot. Killed a chicken snake about a month ago same conditions with one shot from my EDC.
So really, really need to spend some time on the range at the 10 foot mark. In a shootout with a person an inch low or high, no big deal. But with a poisonous snake, it means an entire miss.
And with bullets, etc.. in short supply, I don't want to use them up for that. And it's going to take actual bullets being sent down range to get that right.
So dry fire etc. is good, but bullets better.