Minor nitpick: the primer in the botched dummy cartridge wasn’t enough to fire the bullet, but it was enough to unseat to it from the case and lodge it in the barrel. Later, a normal blank cartridge was fired while the bullet was still stuck in the barrel. The powder in the blank was enough to dislodge the bullet and propel it to lethal velocity.
Minor nitpick: the primer in the botched dummy cartridge wasn’t enough to fire the bullet, but it was enough to unseat to it from the case and lodge it in the barrel. Later, a normal blank cartridge was fired while the bullet was still stuck in the barrel. The powder in the blank was enough to dislodge the bullet and propel it to lethal velocity.