@ACL9000 One shot stop with a kinetic projectile is subject to random chance - how much solid matter is in its way when it hits? If the crew is lucky it passes through some (relatively) paper thin bulkheads and exits leaving a hole above the waterline. If they're unlucky it hits the engine room.
It's likely that the first hit seriously degrades ship defenses, at which point you better hope the enemy is short on missiles.