Boommer,
If you anneal the case necks and neck size only, that = no blowby = no need to take the action apart.  
Winter Hawk,
Regarding cleaning a b.p. lever action from the muzzle, I have found of you turn the loading port facing down, that keeps the crud out of the action.  I've done that a number of times with my '73 and '94 and it works Aok.  Haven't had to take the actions apart yet.
w30wcf