Exactly right. There is no "half way" when you use deadly force; you don't shoot to wound or knock the gun out of the bad guy's hand. State laws differ somewhat, but by and large if you are at home and in fear for your life, you are justified to shoot center mass until the threat stops. Then reload and watch for the bad guy's partner. Call 9-1-1 and then call a lawyer.

IANAL, check your state's deadly force laws. $.02