It would seem to me if a starter pistol is legal to fire in public, it would be legal in one's private domicile as well.
But I've got a similar story.
My grandmother was awoken at 1:00A early on a weekend morning, by the sound of someone attempting to jimmy the deadbolt lock on the rear door of her 3rd floor flat, while they were living in the building she & my grandfather owned.
Her response? She yelled at the top of her lungs at the door:
"Joe! Get the gun! Get the gun! Get the gun, Joe!"
The intruder bolted, and as he attempted to navigate the turn on the back porch to the stairs, he ended-up breaking through the wooden railing and falling 3 flights down onto the cement below! When the police found him he was half a block down, crawling through the alley with broken ribs and a broken leg!
He had an extensive B & E record, but sued my grandparents claiming to be drunk and at the wrong house. His knife was never found, and the coppers suspected he may have tossed it down one of the alley sewers (they never searched the sewers for some reason). My grandparents dropped their charges (following their lawyer's advice) in exchange for the crook dropping his suit against their property.
But here's the deal: My grandfather was not home during the incident, and they didn't own a gun! Just my grandmother's quick thinking words alone, was enough to deescalate the situation! :mrgreen:grammar