[fortes fortuna juvat]

You don’t shoot to kill,
...........................................
Depends on the circumstances. It’s always better to put a permanent end to thugs with guns. ALWAYS!

[ThunderSleeps]

Well, that is correct. Technically, legally, you employ deadly force in order to stop a threat to your life or the lives of others. Only to "stop" or remove that threat.

Practically though any shot can be fatal. That's why any use of a firearm is considered deadly force. We're trained to shoot center mass because that is typically the biggest target thus improving the chances of a hit. It is also the location of the heart and spine - areas you want to hit for a sure, quick stop. Hits that create a sure and quick stop tend to also be those that are fatal. I believe the 6 out of 7 people surviving handgun wounds is primarily due to poor marksmanship exemplified by gang violence and "spray and pray" shooting.