I use in the very low pounds or .oz in my triggers. That cut down on the hold of the rifle. The lighter the better. finger placement comes into play too. Putting a deaf grip on the rifle doesn't make for a good group placement.
I can remember back in the late 90's with a Ruger Mark 11 338WM that I believe had an 8lbs trigger pull. It was a friend of mind rifle. We had determine that it was petty much a tack driver. So in checking out load combination I was the trigger squeezers That rifle pounded the **** out of me. I findly order out a trigger for it, for him. That made it a lot easyier to get to fire without pulling the rifle off. My groups didn't get any better, but is sure made it better for me. A few years later he wanted to sell it. Lucky for me he came to me first. I purchased it. Put it into my safe. Later I had a muzzle brake put on it. What a change in recoil. It's now my go to rifle for large game. I had learned to hold my rifles with only back pressure to keep the stock to my shoulder only not a death grip. There isn't hardly a rifle or pistol that I haven't done trigger work or replaced. My hunting rifle are in the 1 to 2 lbs area where I can get them too using a gunsmith. Some of the TriggerTech are easier to adjust and simple to adjust, and have change over to them. When or they make them for.
I don't know why they don't build triggers for other actions. They are missing the boat in my estimation.
The rest of it rifle hold.
It's been awhile reading the input, but interesting in reading back through it.
For my boys it was very helpful and sped up the process for them to video them getting into the scope and taking shots. For them to see with their own eyes if they had any flinch, if they were yanking on the trigger instead of gently squeezing etc. if you have a way to record the shooting process it is very helpful imo.