@Captainjack88. Sorry to take so long to respond… as we all know a grip that is to lose will allow the hand gun to move side to side and or up and down under recoil. Then if we grip “white knuckle” the sights will begin to shake all over the place.
Grip size and how it fits in hand slot to do with accuracy as well. A high grip on Semi auto weapons helps with getting bored axis lower in line with hand and arm and helps with mitigating recoil. Locking wrist elbows assist in accuracy and reliability of the function of the semi auto.
The support hand should assist in recoil management and barrel alignment as well.
If the grip of the weapon is too thin it can float in your hand or too wide you may end up inadvertently move it while trying to get a good trigger pull.
Adjusting ones grip to fit the weapons grip size and angle are personal. I find that looking for a grip that’s fits my hand is better than adjusting my hands to the grip. For instance I can shoot the poly 80 grip frame much easier and more consistently than stock glock17 frame whatever the gen.
Trigger control or proper trigger pull is another aspect to shooting. The trigger pull should be a smooth consistent straight back pull with he finger pad until the weapon fires. The trigger should remain in reward position as shot leaves the barrel. Then slow deliberate release until the trigger resets. Some beginners tend to bounce or slap at the trigger, put too much or too little finger on the trigger. This will force shot left or right.
Oh yeah let’s not forget stance , sight alignment and breathing.
For basic info have attached some old stand by charts.
How this helps?
Basically practice practice practice.