In my case, flinch equates to trigger pull and anticipated recoil. I've found that reducing trigger pull ( and a quality trigger with no pretravel or creep) goes a long way toward reducing or eliminating anticipation, aka: flinch.
Flinch will ruin your day when shooting competition and it occurs across all calibers.
In my case, controlling recoil is all about decelerator pads, or muzzle brakes
. heavy, abrupt recoil not only is a detriment to accurate shot placement, it's a detriment to optics and optic alignment.