If it has 3 wheels you can try every combination in about 6 minutes. At least I can with the 3 wheel master combo lock that I have. That means that on average you can pop this puppy in about 3 minutes with a brute force attack. I think that collectively we've spent 25 times that amount of time talking about it.

BTW, a 4 wheel will take upwards of an hour. This works on any lock that will allow constant pressure on the shackle and will pop open when the right combo is hit. Some locks protect against this and, thus, slow the process down considerably.
db