Sounds like great advice to me, Rich. I had no idea those adjustable reamers were that inexpensive.
A final choke of about .005" is all my 20 bore has, and it's patches from shot balls are reusable. On top of
that, it shoots imp patterns with it's imp cyl. choking. Leaving a choke of say, .002" to .003" might give the best of both worlds.
In working with ctg. shotguns with BP as well as my current flinter 20 bore, I've found black powder gives tighter patterns per
choke, than does smokeless. Of course, I've never used, nor would I every use smokeless in a muzzleloader unless I wanted it to blow up.