It's easier to boil a Colt.
Any Cap and Ball revolver will safely handle all the powder it will hold under the ball, just leave enough space to take the ball, you can figure out YOUR accuracy load at your leisure. more Powder more smoke and boom= giggles.
Chain fires are repugnant unpredictable and disconcerting and easily sidestepped by;
1) Ensuring your PRB (lead round balls) are oversized to your chamber, when you seat your ball in the chamber you must see a complete ring of lead that has been shaved off in the process, this seals the chamber from the flash of its neighbor being fired,grease doesn't count here.
2)Caps must fit your nipples, if you find you need "pinch" caps to hold them in place, they don't fit and you are courting an unpleasureable surprise.
Get an adjustable powder measure 40 grns max for most pistols,Colt Dragoons 50grns, and THE Walker 60.
Grease, there are many on the market, or you can melt beeswax or paraffin and add some olive oil(cheap and good as any)
Have scads of fun.
When you get home remove the grips, break the revolver down, two pieces for the Remington, or three for the Colt. Use soap and water to clean,then place parts in pot on stove with boiling water, when removed from the water the heat sunk in the steel will dry the water, so no rust now or later, oil when you can handle.
When the wife complains of the smell, tell her something died under the stove and you've handled it, now your a hero instead of a cad.
Have fun and good luck
robert