from the old forum:
I was wondering if the bullet design program can produce a bullet with microbands like Lee produces. I like the tumble lube idea, and versatility. Thanks,
Answer: 'No, in fact, there will eventually be some changes to the program to increase the minimum band size, proportional to caliber. The smaller bands can be a pain to fill out and diameter control goes down the toilet.
Any cast bullet can be tumble lubed, though you may have to reapply the lube two or three times to completely fill conventional grooves.