Yep, like Erik said...coned torquemaster. All the good stuff inside like a sporty, with a slightly narrower bullet. Should be a really good, stable, fast case. I have a coned torquemaster as well, but I've yet to run it.
The torquemaster's unique identifier is the cast-in circular boss directly in front of the beginning of the cavitation plate. My understanding is that Merc cast that boss into the case due to the popularity of coning these cases, and that's a drill point for the water tube feed. Don't know for sure if that's true, but that's the story I've always heard.