Okay, there are a lot of points to cover and since it is so jurisdiction driven, it is best to read your policy and review this with your agent AND insurance company. In fact, I would get a definitive answer from the insurance claims department.
If you have homeowners insurance you are protected against any damages you may be found to be legally liable for. However, there are exclusions. The important exclusion to consider is the intentional act exclusion. Many policies exclude damages caused by your intentional actions.
So when you think defending yourself is an intentional act, it is. But like I said, it is very venue specific. One state's case law may dictate that acting in self defense was not intentional, while other courts hold that by simply using a firearm, you were acting intentionally regardless of the circumstances.
But since you live in Nevada and I handle litigation in your area besides just Reno, you would have a problem. The Nevada courts have held that despite your intent, it was reasonable to conclude that someone would suffer injury due to the acts of firing a firearm. Now if you used it in a crime, you cannot seek protecting from your insurance company against a negligence (or tort) action.
Now an accidental discharge is a completely different story, and likely you would have full coverage for any action or claim against you besides punitive damages.
It is important that you get with your insurance company. Not the agent by themselves. Agents are there to sell coverages. They do not make coverage decisions. Call in to make a claim but then ask for someone knowledgable enough and experienced enough to answer your questions.
Hope this gives you some idea of what to ask for.