There is a difference between owning guns and knowing how to safely and effectively use them.

Preference : I am not an attorney or a law enforcement officer.  I'm not giving out legal advice.  I'm just a regular guy that's tired of all the macho posturing I see and hear by people that think simply owning a firearm automatically makes them able, qualified and justified to use them.

Let me begin by stating that I am a pro gun second amendment supporter.  I legally carry a gun most days and I fully understand the legal moral and ethical ramifications of any action or inaction involving a firearm. There is an old saying that "Every bullet you fire has a lawyer attached to it."  In other words, You are responsible for the outcome of your actions involving a firearm.

 
Do you know:

• When it's reasonable to use deadly force?

• When it's legal to use deadly force?

• The local, county,  state and federal laws regarding the use of deadly force?

• How to use your weapon in a safe and effective manner?

• Where will the bullet go should you miss your intended target or if the bullet passes through your target?

•  Is there a way to defuse the situation and egress?

How many times have you heard someone say "If you shoot someone, make sure that they're in your house or be sure to drag them inside"?  Just the fact that someone is in your home without your permission doesn't give you just cause to use deadly force.  As far as "dragging a body into the house", that's called tampering with evidence.

Are you familiar enough with your firearm(s) that you will be able to use it/them safely and effectively under the mental and emotional stress of a potentially violent confrontation?  The only way to be reasonably sure is to practice.  I don't mean once every year or two, but at least once every month or two.  Learn about the capabilities of your weapon of choice.  Learn about your strong and weak points.  If possible take a defense class. Take some lessons from a firearms trainer. Maybe instead of buying another gun, use the money to attend one of the many reputable schools for a weekend or even a week.

In summation:

• Read a book and take a handgun safety class.
• Go to a shooting range.  
• Join the NRA.  They offer firearms training and safety information and classes. The NRA-ILA are  also avid defenders of the second amendment.
• Become familiar with the safe handling and operation  of your gun(s).
• Learn the laws and know when to and when not to invoke deadly force.
• Practice as often as you can.
• The best potentially lethal confrontation is the one that never happens!