a look at handgun stopping power real world incidents
The projectile is a big part of the gun, most modern designs are based on the wounding not killing, financial bankruptcy and resource depletion of enemy forces. Takes more to take care of one wounded than one dead.
Most gun fights non military/war zone are close and personal 20m or less people practice to aim and hit target of paper that is fix mounted. Real world you will point gun and shoot, totally different type of target practice required.