I have cast for about a decade, mostly tumble-lube style bullets from Lee, mostly in handguns going typical handgun velocities, doing it the way Lee prescribes.
Since there are very few tumble-lube style bullets for rifles (30 and 358 caliber), and I have no Lubriziser type device, I've been doing this:
I take a small metal dish and fill it with LLA and heat it up considerably on an electric range or wood stove. Then I dip the room temp bullet, holding it on the ogive or bore riding section, into the hot LLA. I then place it on wax paper to dry, much of it runs down. Then I size it with a Lee-style push-through sizer to a thousandth over groove diameter (.309 in this case).
I've found that this manages to fill out standard lube grooves. It also keeps the nose part of the bullet clean if I choose. I've found that LLA has acceptable performance in my 32-20 Contender 10" running at full power, or just under 40,000 CUP. I have yet to try it in a 30-30 rifle.
Any thoughts, suggestions, or admonitions?