Yeah, wrong section, but it'll sort itself out.
Keep in mind that the vast majority of my positional shooting and related practice has been more related to service rifles vs precision rifles. That's actually the historical norm though, so here goes:
When working on positional dry firing, to me the focus wasn't about actually squeezing the trigger as much as it was practicing the position to minimize wobble and get the remaining wobble to settle into the tightest most consistent pattern possible, usually described as a "figure 8"
Once i I felt as though I had build a solid position, I would then focus on my Interrupted Trigger Squeeze, which is breaking the shot as my wobble passed thru the target. With a service rifle there is a lot of mush and creep and take up compared to a crisp precision rifle trigger, so it's a little different, but still the same: you're NOT snatching the trigger, you're simply only applying pressure as you wobble across the target. By only applying pressure in this manner, then the shot should only break when you're on target (or damn close).
The less stable the position, the more Interrupted Trigger Squeeze can help you.
As for position building itself, it's all about experimentation within the rules. In service rifle, those rules are fairly strict. In PRS they're almost nonexistent. Try all manner of silliness you can think of in order to get the most points of contact and skeletal support. If you don't have one of those huge assed pump pillow shooting bags that are basically standard equipment now, then play around with a bed pillow. You can find a lot of PRS videos on YouTube that'll show how they're being used.
Obviously natural point of aim, natural respiratory pause, trigger control and follow through, and all the other fundamentals still apply as much as possible.
Every time you squeeze the trigger in dry fire you should be able to say with near certainty where that round should have impacted on the target. That's "calling" your shot. Build that habit and do it on the range during live fire. As soon as the shot breaks you should "know" where it went. By the time you've recovered from recoil and reset the trigger, and are able to observe impact through the scope ("plotting" your shot) it should be where you thought it was. That applies to pretty much everything you will ever shoot.
Not not sure if that's what you're looking for, but it's a quick and dirty "rifleman 101" from an old rifleman.
