can you tell us how much you were pressing when the tear occured, and if there's anything you feel you did wrong (poor warm-up / poor form etc.) that contributed to the injury?
I was doing 455 and tore it on the 6th rep. I was plenty warm so that wasn't the problem. There are a few things that I think led to the injury. First off, it was my FIRST day in California (I moved there from Iowa), so I was driving for 25 hours without my usual sleep, food or water. I woke up my first day there and ate breakfast and went to the gym. I was most likely dehydrated, depleted, etc., from the drive. Also, I never go below 6 reps to avoid injury and I ended up getting injured on the 6th rep anyways. I will only use dumbells and machines from now on and hopefully my chest will get a little better.