You don't have to do a warning shot.
A verbal warning is sufficient. If the guy ignores the verbal challenge and continues to advance towards you with intention to assault, you are legally justified to use force as self-defence.
Movies and Hollywood are a lousy source of procedure. In most movies, stuff are dramatized and the methods in them can get you killed.
I went through a firearms course in Australia and you generally do not fire unless you are sure of your target. That is why you don't normally fire warning shots because you don't know where your bullet will be heading. The other reason is if you are using a low capacity firearm, such as a revolver, you only have six shots (and possible multiple assailants). You cannot afford to piss it all away on warning shots.
If you are in a situation where you have to fire, it means you are already at the point where deadly force becomes necessary. Otherwise, you do not fire. If you have to shoot, you aim for body centre mass (upper chest to the solar plexus area). That's the largest target where most of the vital organs are concentrated. And you fire until your target is down and out of the fight. You don't shoot an arm or a leg simply because these are not vital organs and are not guarantee to stop your target.
Headshots are difficult. Anyone who has actually gone through a firearms course will be able to tell you how small a target the head can be. It is difficult enough to do headshots on a paper target at a firing range. Add in all the stress, fear and adrenaline in an actual life and death situation with a moving target and it becomes almost impossible for most people to get off reliable headshot.
A verbal warning is sufficient. If the guy ignores the verbal challenge and continues to advance towards you with intention to assault, you are legally justified to use force as self-defence.
Movies and Hollywood are a lousy source of procedure. In most movies, stuff are dramatized and the methods in them can get you killed.
I went through a firearms course in Australia and you generally do not fire unless you are sure of your target. That is why you don't normally fire warning shots because you don't know where your bullet will be heading. The other reason is if you are using a low capacity firearm, such as a revolver, you only have six shots (and possible multiple assailants). You cannot afford to piss it all away on warning shots.
If you are in a situation where you have to fire, it means you are already at the point where deadly force becomes necessary. Otherwise, you do not fire. If you have to shoot, you aim for body centre mass (upper chest to the solar plexus area). That's the largest target where most of the vital organs are concentrated. And you fire until your target is down and out of the fight. You don't shoot an arm or a leg simply because these are not vital organs and are not guarantee to stop your target.
Headshots are difficult. Anyone who has actually gone through a firearms course will be able to tell you how small a target the head can be. It is difficult enough to do headshots on a paper target at a firing range. Add in all the stress, fear and adrenaline in an actual life and death situation with a moving target and it becomes almost impossible for most people to get off reliable headshot.