Landshark (love the name by the way remembering SNL from the 70's)I blew up 3 before I got a shooter so you still have a ways to go. I've often said on threads I'm not the biggest fan of red oak and much prefer hickory or pecan which are much tougher woods. That said, many bows have been made from red oak and if the wood isn't too dry and the grain is good it should make a 50#er at 28". Don't give up because you learn a little with each one you make. Pick up another piece and try again., and see if you can find a piece of Hickory while you're there.
Remember never pull the bow further than a possible problem (before correcting that problem) or higher than intended draw weight whichever comes first and only an inch at a time and excercise it as you go.
Pick yourself up cowboy and throw a leg over that horse again. It's the only way to break her.