Thanks Zee! I'll start somewhere lower and work up to that.

I've been doing more digging and the Hodgdon data (10" barrel) matches the Lee manual for charge and velocities so I think the Lee data above was also a 10" barrel. My Lyman manual (49th) starts at 16.3gn at 1178fps and tops out at 17gn with 1309fps with a 4" barrel and a universal receiver.