Good for you Corey! There are molds out there that are designed for sabot use, smooth sided.
http://www.brp.castpics.net/ is one of them, I have there 300 gr. smooth sided for MLs. shoots great, I have harvested 2 deer this year with boolits from a 5 cavity mold they made for me. good people to deal with, I also have a LBT 333 gr LFN double cavity mold that works just as good.