Let me preface this by saying that I realize the military and civilian worlds are *NOT* the same thing... however, the training I received in the Navy served (for me) a good basis to understand these sorts of situations from... I realize this position may not be the MAXIMUM level of force you are allowed as a civilian, it certainly seems to me to be reasonable enough and covers your *** from any sticky legalities... what I was taught is this:
In the military (in general, there are specific exceptions in specific cases that are outlined in writing) you are not allowed to defend PROPERTY with deadly force. You are only allowed to use deadly force to defend:
* life, and
* violent physical crimes.
The caveat to that, however, is that, to a reasonable person, the offender must demonstrate:
* OPPORTUNITY
* INTENT
* CAPABILITY
The easy way to understand how someone would stack up to all (3) of these is to think about these examples: a thug of similar size to you has broken into your house and upon confronting him he reaches for your weapon in an attempt to take it from you -- this thug is demonstrating OPPORTUNITY to harm you (he is both physically similarly-sized (or larger) and there is a gun in his presence which he could likely take possession of), he is demonstrating INTENT to harm you (he is attempting to take your weapon from you) and he is demonstrating CAPABILITY (by attempting to take your weapon he is showing that he is CAPABLE of presenting a threat to you)... conversely, a little old lady who has pried your fence open to steal some of your cat food b/c her cats are hungry and she is poor and you confront her and she piddles herself, falls down trying to run away, and starts screaming wildly still has OPPORTUNITY but reasonably lacks INTENT and CAPABILITY)... and, for additional contrast, a thug on drugs stealing your bike from your back yard and is hopped up on drugs has OPPORTUNITY and possibly CAPABILITY (some drugs make you immensely strong and brave) but is not showing INTENT by merely backing up with his hands in the air and then turning to run away.
So, you can't defend your house from being broken into, right??? *WRONG* When you realize a person is breaking into your house you grab your gun and confront them with your gun at the side of you leg pointing down in a non-threatening but visible position. You'd be best to have a small bat in your other hand, too. You confront them with a loud, authoratative voice, warning them you have a firearm and will shoot them if they come towards you and whack them good and hard with your bat (not deadly force and easily justified given the situation). Most will turn and run seeing the gun. If they instead turn on you, you shoot them -- why??? Because they knew you had a gun and instead of stopping they advanced on you in an attempt to take the gun from you to turn it on you (thus attempting to put themselves at a stronger position than yourself), they demonstrated both intent, ability, and opportunity to inflict serious harm on you... and you are then justified to use your firearm. If instead they actually ignore you (not likely) and continue ripping wires from your home stereo you continue to hit them with your bat... until they either stop and wait for the police, they pass out from being hit, they stop and flee, or they attack (and you shoot).
Again, I realize this may not be the strongest you are allowed under the law but this seems to me to be both reasonable as well as easily defensible....
... a few days ago I read on this board that your firearm is your last weapon of choice and that you should try to have other smaller tools/methods available to you... I agree.