The cannonball, about two inches in diameter, smashed through a window and a wall before landing in his neighbour’s closet. Authorities said no one was hurt.
State police charged Mr Maser with reckless endangerment, criminal mischief and disorderly conduct.
No one answered the phone on Friday at Maser’s home.
He told WPXI-TV that recreating 19th century cannon is a longtime hobby. He added that he was sorry about the damage and would stop shooting them on his property.