BLUF: setup your shooting grip to include an element of static muscular opposition to the dynamic movement of the trigger’s press.
(Borrowing from another thread...)
In theory, the optimal grip for my folks as I see it is something along the lines of:
...Shooting-hand as high up on the backstrap as possible, rotated forward sufficient to operate the trigger from rest in one uninterupted stroke when firing one-handed with the thumb flagged up and pressing laterally against the frame.
...Support-hand index-finger choked up high into the intersection of the shooting-hand's middle-finger and the underside of the trigger-guard. The support-hand index-finger may rest between the first and second knuckles of the shooting-hand, or it may clasp against the shooting-side edge of the trigger-guard.
...Support-hand thumb advanced sufficiently far forward so as to be in-line with the trigger finger's tip at full rest, or further; sufficiently far forward that the meaty portion of the support-hand's thumb is pressed high and firmly against the frame (from meaty base near the wrist to the tip at the far end), but not so highly that it interferes with automatic or deliberate functioning of any firecontrols.
...Shooting-hand thumb posts on or between the first two knuckles of the support-hand thumb.
...both elbows rolled over, adding additional contra-rotational pressure within the shooter's grip, loaded primarily between the shooting-hand's first knuckle and the entire length of the support-hand's thumb from first knuckle to tip.
The two main influences for any shooting grip are the requirements for trigger operation and the requirements for managing recoil. There cannot be recoil without trigger manipulation, so the requirements of the initial trigger press have priority over anything related to recoil. More so, there is an ethical weight associated with the performance of some trigger presses but no equivalent for the matter of managing recoil; again, the needs of the trigger win out. Aligning the centerline of the firearm with the web of the hand and the bones of the forearm is mostly associated with "instinctive aim" and greater recoil management; but the former falls by the wayside in the days of using sights and the latter alignment between weapon and forearm bones is only expressed during the one-handed shooting, as the alignment is immediately distorted by any two-handed firing grip.
I don't advocate for any such alignment, nor do I look for it amongst my folks; I don't see the concept to have significant value in the least. I do admit the bias of never having found a weapon that I can effectively fire with such an index, and certainly not any work-issued weapon of the last 16 years.