No experence with lever actions but I would think that if you used a SWC top punch it wiuld put enough of a flat area on the nose to be safe, but if you hve a choice, go with the flat nose.
To reduce the stickyness, cut your LLA with mineral spirts, also go the the cast boolit web site and read up on LLA/JPW/MS mix.
I play with moly coating my bullets, never with LLA coated bullets, for thoses I use motor mica