Well, under stress it all kinda hits rock bottom. That is why training as you would see yourself is the best method.
Trigger: two methods are the pad or finger tip for fine shooting but another is the first joint used for rapid fire.
*You'll hear from people either a preference (pad or joint) but look at the uses of each and decide which works better for you.
When you have the trigger on the pad you're using the fine motor and sensory abilities to pull the trigger which is idea for accurate shooting. Now the joint area gives you the ability to leverage and hold the gun more securely. This lends to better shooting rapid fire and under stress.
"Shoot Safetly, Shoot Often and Share Your Sport." Jim Scoutten, Shooting USA
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