Hey Griz,
I have an indoor range in my basement, and I shoot a lot of bullets that I personally cast, size, and lube. In my experience, your choice of powder and the amount of powder have far more to do with smoking up the indoor range than cast bullet lube. I know that in my range, we can shoot .22 ammunition all night with very little smoke. As soon as we start shooting centerfire ammo, we have to start the ventilation fan. There is also a big difference between shooting a few grains of Bullseye in a .32 auto and shooting 14 grains of Bluedot in a 44 Mag. I use RCBS and Lyman bullet lubes for my cast bullets, but I personally do not think the lube has anything to do with producing enough smoke for one to notice. Powder is a different thing, however.
Best wishes,
Dave Wile