Large Bore Target shooters are known to “Dry Fire” their rifles hundreds of times in preparation for a Match, but not so much for the hunter. The hunter often bench rests his/her rifle to sight in and then it’s off to the hunt. It is not my best practice to shoot game, not knowing where the trigger will break when standing off hand or even on shooting sticks. Do you sway left and right a bit like I do? Can you practice to control that sway? Part of that is my heavy breathing just before pulling the trigger.
Practice before hand will aid me greatly in rifle hold, with or without the use of my sling or on a bipod or tripod or just shooting sticks.
Dry Fire is NOT recommended for rim-fire rifles. However, many say it is fine to dry fire, pull the trigger on a center fire rifle. See this NRA Article on Dry Fire.
https://www.nrafamily.org/articles/2018/12/28/is-it-safe-to-dry-fire-your-gun/
Me personally, I am going to use a Snap Cap fake round or an empty Dummy case in my Ruger rifle to absorb the strike of the firing pin anyhow. I have spent cases which I am currently using for my dry fire exercise.
Ok, so you are in a safe place to point your rifle out in the field or at the range. You aim without a brace and find that your crosshairs wobble around the target. In my wobble, I find that if I bring the rifle up and aim slightly high if doing it free hand, the gun will wobble lower to the point of aim, I begin the squeeze and breath hold. When the rifle goes click my mind captures the scope picture the instant the gun went click. You know right then whether you were on or off target. Practice! Practice! Practice!
If using a rest like shooting sticks or a bipod, I notice my height is good but I tend to sway left and right a bit. Practice will help.
You may find that your trigger is too heavy. Fix it ASAP. I do not recommend triggers below 3 pounds pull because you are on the move, cold, excited etc. Three to Five pounds is good. You are the judge. I do not recommend turning your scope power up too high as your wobble will be nearly impossible to steady unless you have a rest that you have that works under high power.
Try that at different ranges say 50 yards then 100 yards etc. I notice that with practice my wobble is much tighter and my confidence is much higher.
Good Hunting!