I have stayed away from from the Ranchdog molds, my understanding is that they are made on Lee blocks and are meant to be tumble lubed only, 2 strikes against them. I believe and correct me if I'm wrong but there is no provision for sizing them to your bore. Sizing them would wipe out the grooves and you are stuck with the "as cast" size and the mess of tumble lubing them...someone edumacate on these molds and why I'd want one....IMHO
Ben - you're not ever going to want one because they're Lee, and they're tumble-lubed, both of which you are stridently against. Many others use them and are satisfied.
I have MANY molds: Lee, Lyman, RCBS, NEI, Mountain Molds, MiHec, Hensley and Gibbs, etc. made of various alloys of aluminum, steel and brass. I still like Lee.
The Ranch Dog molds I have work well, both dropping from the mold, being shot from the gun. A nice thing about the 45 cal ones, is that they drop at about 0.460", and Ranch Dog sells a Lee push-through 0.460" sizer - neither Lyman nor RCBS do that. As for the suggested Lyman mold, beware - Lyman quality has dropped significantly in the past few years and they are now notorious for being undersized. I have no use for a 0.457" bullet and that's what you will get (or less).
As for the "tumble-lube" micro-grooves, I know the limitations of Alox and use it accordingly, but you are not limited to Alox tumble-lubing. There are alternate tumble-lube recipes (e.g. "45/45/10") and you can also pan-lube, or lube in your Lyman or RCBS Lube-Sizer. If you size it down 1-2 thou, you lose a fair bit of lube capacity, but there will still be a significant volume and surface area of lube. I don't size down, so it doesn't matter.
Then there's the price - they are inexpensive, and that irritates many of the "casting elite". Yes, they will not last the longest, but they will last long enough for most. Fact is, they are all that many casters will ever use, because they don't want to buy an expensive mold, and handles, and a lube-sizer, and heater...... Without Lee, they would not cast, and would never "graduate" to the big boy molds.
and that's all I have to say on the matter.