And if you're getting your tutoring from the owner of your brother's dog, it'd be a good idea to pay a little less attention to him & more to those who know more.
Fingers has addressed the barrel swab idea neatly.
I don't have spare cylinders for my lone Remington, but I've shot a fair amount of successive shots through it & various Colt copies.
I've never bothered to swab a bore during any shooting session.
Lubed wads between powder & ball, or the messy method of packing the empty space in front of the ball with a grease of some type in each chamber if you want to bother with that, generally keeps the fouling soft enough that it doesn't materially affect accuracy.
It COULD be an issue IF you're going for absolute target-grade accuracy in a match of some sort, but for your type of shooting, it's not worth the effort.
I don't clean anything on my percussions during a shooting session unless the cylinder starts to gum up & rotation gets stiff.
Re that, use a good lube on your cylinder pin & it should get you through a bunch of shots, even in switching through four or five different cylinders.
Make SURE you DO NOT USE A PETROLEUM-BASED GREASE OR PASTE-TYPE LUBE on that cylinder pin.
And DO NOT USE OR LEAVE A PETROLEUM-BASED OIL INSIDE YOUR BORE OR CHAMBERS AFTER CLEANING.
Denis