I've never been.
But in all honesty, any good instructor can teach any willing student to shoot single-hole groups at reasonable distances.
Their ad:
Deadly Accuracy Home Study Course
cited:
Tina was a first time shooter. She was able to shoot this 1-Hole Group in less than 35 minutes at a distance of 15 feet using a Glock 19 after learning the Insight Method.
and
PAM R.
1-Hole Group with her first 12 shots at 15 feet. She was a first time shooter using a Glock 9mm and applied the principles you’ll learn in this program
I've seen similar results from other good instructors with similarly inexperienced shooters, where their specific teaching was the focus on the enhancement of precision/accuracy.
The only thing that one needs to understand in order to achieve that kind of result is that "a group" is nothing but the culmination/summation of a series of individually perfectly delivered shots.
Don't shoot a group.
Shoot individually perfect shots at the same POA/POI.
Your end result will be "the perfect group."
This is my daughter's target on her second range trip. It's at 10 feet, with a CZ 452 Scout chambered in .22 LR, with the single-shot adapter in-place.
She was about 8 and 1/2 years old at the time. Her first shot was that high flier.
The next 5 shots were parts of her group. The 7th shot was another flier, the one that hit the bullseye (we joked that was the result of two wrongs making the perfect right :lol
. The next shot was re-established in the group. There were two other shots that also punched that same group. Her physically small size is still causing a mis-fit with the 452, causing her to push her shots. I specifically asked her to not chase the bull, to simply execute the same shot each time. I wanted to teach her the idea behind "grouping."
Now, about a year later, as she's grown-in into the gun a bit more, she's center-punching those pasters at-will.
I also have a picture of her in which she center-drilled, with her first shot, a Red Bull can at 9
yards using my airsoft 10/22 replica (it was $700 to import, so it cost considerably more than my actual 10/22 :lol
. That picture's a bit funny because the carbine came up to about eye-level on her. She was 5 years old at the time, and shot it with me supporting the front of the stock (I didn't aim for her, I just held).
There's no trick to it.
There's no high-dollar system.
The fundamental truth of shooting is starkly simple:
[ sight picture ] + [ trigger path ] = [ hit ]
The ability to execute each of the left hand factors towards perfection will determine the amount of deviation on the right hand side of the equation.
And if you execute a bunch of perfect shots, you'll get a perfect group.