If there is no damage to the gun and no damage to your person, I wouldn't be concerned. Ruptured cases happen; if you snoop around these forums enough you'll come across several stories of cases that didn't hold up to the task. If you're worried about the 442, give it a good checkout, look it over very closely, and maybe even spec the cylinders with a bore gauge if you have one. I think you'll find that your shooter is still in fine shape.
You may want to closely examine other cases from that same box for cracks, too. Could have been a bad batch...it happens. If you find others, you may want to skip over that brand in the future.