After reading this thread I thought I would chime in.
I bought my Dillion RL 550B used off of craigs list and used it for about 3000 rounds
at which point it started feeling a little sticky so I took it apart as I could not fins any
good way to lube it while it was together and in doing so I found that part 13834 and 13881
had traded metal (galled) parts 13583 and 13747.
I took these parts to Dillon (as I live near Scottsdale AZ) and they replaced them FREE (on a used machine!)
EDIT
A quarter inch six inch long extention is the perfict size to nock out parts 13834 and 13881
EDIT
While talking with the Dillon tech he told me to use wheel berring grease on the hole machine and not to lube
any of the powder drop mecenisem at all just clean it well.
As far as the drilling and tapping of the lube holes goes I suppose you could but why not just go to the bike store
and get a pointed grease gun for bicycles, as slow as this machine cycles I do not think that the type of grease matters
that much as it will harden long before it losses it's lubrisity and that is the goal to lube rite?
link to the pdf where I got the part numbers from.
http://www.dillonprecision.com/docs/dillon_rl_550b_manual_may_2007.pdf
My 00.02 = exactly two cents.
