Thing is, if'n you take a inside mic to the revolver chambers you'll see that they're usually smaller than the bore of your barrel (usually by .004-.006"). If'n you think this a fib, simply (while your revolver's unloaded and the nipples out -) squeeze a ball of yer favorite size inta a chamber, then push it out (just like ya loaded it "dry". Take that ball (takin care to maintain the same orientation to the barrel as it had when it was in the chamber -) and simply drop it inta yer barrel. If it rattles all the way down and falls out ta end, well, hey , you'll know I weren't fibbin.
There's actually a lot of information on this subject (you can find quite a bit at
this web-page in a different forum, and
this web-page "blog" has a fairly decent run-down of the different ways to "open" up the throats of yer chambers in ta cylinder to obtain fairly decent accuracy), just gotta look around a little.