Those are great ideas . . . One of the fatal flaws of the Crockett, is the breech is a monster. There's some evil troll down there living in a cave that grabs patches, jags and rod ends . . I've gotten the rod stuck in there half a dozen times . . . getting it out took an act of congress. . . I complained to Traditions about that too . . . they knew of it. On my Lyman GPR I can stuff the breech full of patches, twist and twist for an hour and pull them right out. . one thick patch on a .32 jag has been known to catch on a hook or ledge, if I am not careful, in the Crockett, and I'm screwed until I use my trick of hooking the rod to a vise via a nail through the hole in the rod, and pulling on the gun with all my might, praying I don't impale myself or drop the gun if I trip.
Wire brushes are no problem, nor are swabs . . .so that's what I tend to use.
The crown or end of the barrel is completely flush all the way across. . . unlike some other rifles. I have been tempted to take sandpaper to it. . . and had that suggested. . but it does look OK.
there's a ML club not far from me that shoots on Sunday's I may see if I can take it and have some guys shoot it. Great small group, but they are into the peripherals, clothing, lunch, etc as much as the range. . . and I am usually in church Sunday AM. . but I think its time I look them up again.