For "them as runs" Uberti 1860s ...

[Oregon Bill]

I've been reading posts and watching Youtubes on correcting all the grievous ills of the Uberti percussion revolver until I am blue in the face and fairly confused. Don't have the money or the time to have them corrected by a pistolsmith, or the tools to complete a Pettifogger fix, so here is what I propose to do: degrease, clean and re-oil with Ballistol, break all surfaces, deburr and "de-fang" the hammer safety notch to reduce cap-sucking, per Mike/Duelist54 using an Arkansas stone. Install Slixshot nipples. Commit armed robbery to secure a small supply of caps. 
I may consider dropping a 5mm washer or two down the arbor hole to pay homage to the notorious Uberti short arbor issue.
Then I will just shoot the danged things and hope for an outcome that isn't totally humiliating. Sound like a plan?

[DeaconKC]

Sounds good! Run that beast!

[Cheyenne Logan]

  You'll be fine.

[Crow Choker]

Bill, If yer talking about a 5mm split washer I was never impressed in their use. Sometimes the thickness was to much and didn't care for the springiness of using them. I've found very satisfactory success using four thicknesses of brass washers the approx diameter of the arbor, selecting the right combination of washers to take up the space if the arbor was to short. I even thinned a few down on a whetstone to get the proper combination. Works very well, just remember they may come out when dismantling the revolver and stick em back in.