I know this is powerful necroposting, but I believe it may be of some interest to someone.
PAPER CARTRIDGES.
Preloaded paper cartridges were very common in civil war era, but revolver cartridges were very different in composition and use from musket cartridges. While the latter were made with heavy, stout, long fiber paper and meant to be opened, powder poured in the barrel and paper used as wad, revolver paper cartridges were made out of nitrated paper. They were thicker and far more robust than revolver paper cartridges made with cigarette-like paper today. They were meant to be loaded as they were, and they burned completely in the chamber.
RELOADING
Reloading a cap-and-ball with paper cartridges wasn't much slower than reloading a SAA: you just pressed the paper cartridges in the chamber and capped the nipples with a capper. Compared with ejecting spent cases and reloading, it's a slower process, but not that much. The custom of carrying two revolvers came from the times of cap and ball: far much faster to draw a second, loaded gun than reloading the first one (what today is called a "New York reload").
GREASE, BULLETS AND CHAINFIRES.
Vintage bullets were all lubricated. They had deeper grease grooves than modern bullets.
There's no evidence of grease being added in front of the bullet itself. Field tests also proved that most of the soft grease smeared in front of the bullet in chambers gets sprayed away at the first firing of the gun, due to recoil and gas escaping from the cylinder gap.
Chain fires are caused either by loose primers or by "dirty" loading practices that leave the face of the cylinder dirty with powder, which can get trapped between ball and cylinder wall, and transmit the fire from the firing of one chamber to the adjacent one.
Wiping the cylinder face of any grease residue and "clean" reloading techniques avoiding to pepper the cylinder face with powder do marvels to prevent chain firing.
Bullets had deep, wide grease grooves that were greased with tallow and beeswax that helped keep powder residue soft.
With spherical bullets it's better to put a disc of hard BP grease between powder and bullet, than greasing the face of the cylinder.
It's FAR less messy, and keeps the powder residues far softer and the barrel cleaner.
Grease in front of the bullet gets sprayed away as said, and gets anyway pushed out of the barrel by the bullet, leaving hard caked carbon residue behind.
What (solid) grease between powder and ball does is different: upon firing, it gets vaporized by heat and pressure, mixed with the burning gases, and leaves behind the bullet a layer of carbon residues mixed with grease.
This is very soft, so soft that you can actually mop it out of the bore, leaving a clean barrel.
Military loads didn't need it as they used conical bullets with deep grease grooves, using the same grease.
Do not use "creamy" greases! Grease must be hard enough to be solid at room temperature, so as not to contaminate powder. I tried 50% beeswax, 50% vegetable margarine (originally tallow was used) with excellent results it was smelted in a shallow tray, then I used a section of 45 case as cookie cutter to cut grease "pills" for use in my Uberti Walker.
I shot dozens of 44 grains FFFg + round ball shots with the barrel still comparatively clean afterwards.
CLEANING (after proper greasing)
I cleaned up the gun just by mopping out the residues, without using ANY water or solvent, and lubed it with jojoba oil (which is almost equivalent to the sperm whale oil used back then). No traces of rust after repeated firing and a couple years sitting in my safe.
This page has lots of interesting information about effectively greasing and preventing chainfires.
Hope it helps.
http://www.geojohn.org/BlackPowder/RevolverMobile.