I don't want people to think I am saying you have to pull it every time, I just do it for the heck of it. It wastes more time and in my opinion gives the barrel more time to cool between shots. I'm in no hurry when shooting my ML usually.
And with my rifle you HAVE to fire a cap after running a patch down the barrel, espcially if the plug was left in. Must be a crappy design on Remingtons part or something. If I don't fire a cap first to blow everything out of the breech and nipple it will not fire, sometimes resulting in having to pull the breech any way and dumping the charge out the back. My remington is pretty accurate, but not the most user friendly ML I have seen.
I would prefere to just pull the plug and clean it from the back with the bore guide any way. It is somewhat if a pain in the butt compared to just going from the front though. However I like the results and don't mind so much most of the time. It is by no means anything you have to do, non of my friends do it. They don't even run a patch down thiers until the bullet won't go down.
I've always been a little odd
Paul