Well the example I always seem to use is the Skull 5010xx 6x6. The one-wash and the raw version are the same jean, except the one-wash has been washed once.
Here are the size charts stolen off BiG:
What I think you are thinking of is sanforized denim from Diesel or something. All those denim have already been washed already, so yeah, you won't get much results shrinking an already shrunk pair of jeans.