Uh no. Don't use a sentimental gun for protection. Keep your grandpapp's bring back SKS in the safe and get a standard ar15 or Mossberg 590 for protection.
And definitely don't shoot to wound. If you shoot to wound and he lives you will be in court and it won't look good if you felt it necessary to use a lethal weapon to wound meaning you did not fear for your life enough to take proper action. I've heard of people getting longer sentences than the burglar plus fines! If he dies he does slowly and in a lot of pain. That kind of suffering looks bad to a jury. Also it's hard to aim for extremities when the adrenaline is pumping. Most trained people can't. You aim for center mass.
If he's wielding a knife no jury would convict if you shot someone who broke into your home and has a deadly weapon. Also no warning shots. You're responsible for every shot you fire. If you fire a warning shot and it hits some bystander you're going to jail. If you need to intimidate just pump your shotgun. That is the universal sound for GTFO.
Oh and don't finish him off because that's execution. Just call 911.