Yep--6 cavity
Actually, I went with it for the better quality mold. Better machining on the vent lines and hella better alignment pins. I won't knock the 6 cavity but I definitely think if Lee applied their 6 cavity manufacturing techniques to a 3 or 4 cavity mold, they would really have something.
I never really had any heat consistencies with the 2 cavities before. I did run to molds though so I wasn't getting one screaming hot.
You cast any yet??