Never knew that a change of grip or hold could imporove your accuracy

I recently bought a Benjamin Trails NP XL 725, in the .25 cal. I did a lot of shooting with it a couple days ago.I tried several brands of pellets and finally settled on a brand that gave me my best grouping results, which was about 3/4: - 1" groups 40 yards.
I decided today to shoot it again and see if I could better that group by trying a different brand of pellets I got in the mail today. After shooting (5) 5 shot groups they were no better than what I had in grouping, previously. So I went inside and starting looking at a few reviews on this Benjamin on Youtube,
I came across a video on my gun that caught my attention. The guy started off by saying, he didnt always like his Benjamin NP, but changed his mind after listening to a friend talk about using a different grip, in shooting that gun and how much that it had helped his accuracy. So he tried it on his video and it was amazingly more accurate than before.
Its a grip, in grabbing your rifle a different way, called an 'Artillery Grip'. My understanding was this was more for spring operated airguns and not so much in the Piston guns like my Benjamin NP XL .25 cal.
https://www.youtube.com/watch?v=0dQ44J6LlTA

So I went back outside and tried his advice. What happened next was amazing. Without making any scope adjustments, just by holding my gun with this grip, my group tightened considerably. I went from 3/4 - 1" groups to 1/2"-3/4" groups. Im just blown away that improvement, was even possible. It would have been easy to blame it on a scope issue or pellet issue. Im glad I watched this video.

My guess is the recoil with this airgun is such that it creates some inconsistancy, but this new grip for this gun, has made it highly accurate.

Has anyone else experienced something like this with any of their guns?
 
It all folds back to one thing in my book - stabilizing the weapon. I figured out long ago that the first key to accuracy was controlling movement while squeezing the trigger.

Recently, I stumbled upon a video by some competition pistol shooter who revealed that this was his biggest secret for shooting accurately. His advice was the advice that I had given newcomers - learn the trigger of the gun intamately, concentrate on keeping the gun still while squeezing and let it scare you when it goes off.

He said this should be taught to everyone after the basic safety lessons were taught, but before instructed on aiming.

It does amaze me just how far POA can shift with a bad trigger pull
 
Whatever works, seems to be the rule. I shoot my springs off a Caldwell tripod that incorporates a small airbag on it...the naugahyde surface lets the rifle slide as it wants, and that seems to work for all of my herd, with my off arm curled around to cradle and adjust the buttstock. Conventional wisdom says this shouldn't work...but...it does. So, OP, hey, if it works for ya...head on!
 
I find for myself that trigger control and sight picture makes all the difference. 

Magnum springers are hard for me shoot. Now having said that I’ve never shot an HW97 or similar. Just the cheap stuff my friends have. Creppie hard to pull triggers and twangy recoil.

I don’t shoot heavy recoiling pistols or rifles well either.

Seems to me if you are getting under an inch groups at 50 yards you ought to be teaching the rest of us. That’s good shooting