The 33 winchester is listed in the Hornady manual. They only list it with a 200gr flatpoint which they show maxing out at 2200 fps out of a 24" barrel. In my mind if you were going through the trouble of resizing cases and having a barrel special made, you might as well go up to the .338/.444 (.338 JDJ #2).
The load they show is pretty anemic, so i suspect it would be fine in a contender, but I am certainly no expert. If thats what tickles your fancy I say go for it, but I wouldn't bother with it.