You wont get through a Chubb safe door with an oxy, they are filled with concrete and the inner workings of the locking mechanism. You can chop the hinges off, but that wont do much. And they are almost always alarmed, you don't buy a $100,000 safe and then just leave it there.
We once found a small 2 cubic foot Chubb safe at the dump that was locked and it took us weeks to get into it. The plan was to drill a hole, fill it with water (to not burn the contents) an then use an oxy. In the end we made a 1 inch jagged round hole using a drill (on the steel) and sledge hammer (on the concrete) and only found some documents and junk inside, no cash.
And you rarely if ever regret things you didn't do as there are so many and you can't remember many of those.
But things you did that blow up in your face stay with you for life.
Blakjak of the Sydney branch of the Cave Clan.