Thumbs, beeswax bursts into flame at 140 degrees. Take a small amount and warm it in a fry pan- on the lowest setting it will ignite- not the stuff you want to seal the ends of the chambers. Crisco is okay.
It sounds like you are using round balls. Why are you using paper (nitrated) shells for the powder? If you are tring to eliminate carrying a powder flask and measure in the field the better option is to make some paper tubes (speed loaders for pistols) This might take an hour or so. Take a square of paper and wrap it around a pencil and glue or tape(glue is better). On the bottom fit a round section of paper- larger than the tube- with slits cut around the edges. Fold the slits up over the sides of the tube and glue or tape- now you have a tube with a bottom in it, a "speed loader". Follow the same technique- wrapping a shorter square around the top of your tube- this will form the cap to put over the tube.
An altoid canister will hold about 24 of these paper tubes plus round balls, pre-lubed wads, and caps- everything you need for four extra cylinders of ammunition for taking your revolver on the trail. I made my tubes years ago and they are still in good shape. At home- before the outing, measure the powder charges and a charge in each paper tube. That and the pre-lubed felt wads make a really convenient set up for trail use. Use tissue paper in the altoid can to hold everything tight so nothing rattles around.