The responses to this thread, http://castboolits.gunloads.com/showthread.php?t=107863, prompt me to ask whether tumble lubing with Lee liquid alox, both the process and [target] accuracy is as troublesome as some suggest. Let's deal with the cons first: It's messy (but fast). It gets all over your seating/crimping dies (but so do other lubes). Some object to the odor of liquid alox. Some, notably Veral Smith, are also allergic to it. Then there's the issue of drying time, and lastly, the smokiness when fired. I agree that it can be messy if you swish CB's around in a bowl, but I haven't had a problem with drying time or tackiness. Most of the time, I use liq. alox undiluted and apply it by hand, which is slower and marginally more effective than using the bowl method.
Accuracy & plain base TL CB's: I'm of two minds on this, as I have 2 TL mold: A Lee 240gr. SWC and the Group Buy 30-150-TL. The Lee 240gr. TL-SWC cast very easily, but not always perfectly: defective bands (saved these for foulers and remelted the rest). That CB was also ~.0015" too small for my Ruger SBH. In spite of that, it was quite accurate up to ~1,050fps. However, Lyman #429421, or RCBS 250-K (Keith types), cast larger, could be driven significantly faster (1,200fps) more accurately than the Lee TL CB. My B & M 269gr. WC, which carries very little lube, may be slightly more accurate than the Lyman & RCBS Keith designs, up to 1,100fps. Btw, leading was no greater with the Lee TL design than with the other 3.
The other TL CB I use is the .30cal. Group Buy flat point (truncated cone) plain base 150gr. projectile (140grs. in fact). Since it is large enough to fit my .30-06's bore, accuracy can be very good +, regardless of the lube used or the means by which it is applied. As you might expect, though, velocity is limited to ~1, 500fps (7gr. Clays; 9.5gr. Blue Dot). If I taper it (bumps the nose to .302", the body to .3095", and makes the base perfectly flat*), accuracy is even better, but that defeats the appeal of TL's, doesn't it (cast, lube, load, & shoot)?
So I ask you, is accuracy and velocity compromised by the TL design itself, by the somewhat chancy cylinder throat or bbl. throat dimension, or both? For the record, I have no accuracy problems at ~1,950fps in my rifles when using GC'd CB's lubed with liquid alox or in my Ruger BH when using liquid alox and a GC'd CB (LBT 180gr. truncated cone, 11 13gr. WC 820).
*It will make the base of the GC perfectly flat as well.