I used to completely disassemble and clean every part of each of my revolvers every time I shot them. After a while I began to ask myself if it was even worth it to shoot the darned things. And then one time I bought an Uberti Replica of an 1861 Colt that was used but in excellent condition (from a fellow selling in this site!). Upon receiving it, I took it apart to make sure everything was as it should be and found that there was a bit of black oily gunk in the guts of the gun.
And then it hit me like a lightning bolt - the previous owner never disassembled the gun after shooting it. The oily gunk was in no way affecting the operation of the revolver, it did not promote corrosion, and it was easy to wipe off.
That was my black powder revolver epiphany. I realized then that you do not have to do a complete disassembly after every shooting session.
Now I clean the barrel assembly and the cylinder. And because I have greased each of the nipple threads with an anti-seize compound, I don't even have to remove the nipples.
After cleaning the barrel and cylinder, I simply spray or drip a lubricant, preferably a water displacing lubricant, into the recess for the bolt, hand, and trigger.
Since I've been doing that, I've never encountered any rust or corrosion of any sort and my cleaning time is cut by at least half. An added benefit is that I am not always fooling around with screws that are easy to bugger.
I think tearing these guns down all the time only promotes unnecessary wear, and with today's modern water displacing lubricants, clean up, though still a chore, ends up being much faster and less painless.