338Rules,
No, I don't use extra turret heads for the T7. Mostly I'm either experimenting with 2-3 rounds (and never know which they're going to be) or loading a LOT of one round. Then I'll set it up as a semi-progressive, including a powder measure. It probably would be a good idea to use extra turret heads for that, but space is already at a premium in my loading room!
So when cranking out, say, .204's for prairie dog shooting, I set it up specifically to do that, which takes about 20 minutes, then make enough ammo for at least a couple of years.
