Mt Al,
I likely have to anneal more often than you will. I rifle is an 1871 sporter and the barrel has .452" grooves, so I expand the neck of the fired case and seat a .452 bullet with the crimping and first lube groove seated outside the neck (all grooves filled with lube). Then I size the neck in a 444 Marlin sizing die, until it will chamber. My rifle will not shoot with .446" bullets but does well with the .452". I would like to size them .454" (.002" over groove diameter) but they won't clear the seating die. All that extra expanding and sizing means I have to anneal after 3 firings, but you may not need to do it that often. Whatever you choose, if you find a crack at the case mouth, anneal right away and reduce the number of firings. I use kapok instead of Dacron, but only because I found a kapok filled life preserver many years ago in a flea market.
Mike