Barrel to Arbor Dimensions

[gunboat57]

I'm doing some research on Colt's conversion and open top cartridge revolvers.

Can someone with an original 1860 Army percussion revolver or an original Richards I or II cartridge revolver measure the centerline to centerline distance from the arbor to the barrel?

Can someone measure the arbor to barrel centerline to centerline distance on a modern Uberti 1860 Army percussion revolver?

If this information is already compiled somewhere, I'd appreciate a link.

Thanks in advance for any help!

[gunboat57]

Here's how I find the barrel to arbor center to center distance.  Measure inside top of barrel to inside bottom of arbor hole.  Then measure inside bottom of barrel to inside top of arbor hole.  Add the two measurements together and divide by two.

My Uberti OT shown comes out to .526".

[Coffinmaker]

  Gunboat 

I am actually of no help.  I don't own an original of any of your subjects nor do I own a sample example of a current Uberti 1860 Army.  However:

WHY??

[gunboat57]

"Why?"
OK, fair question.  I have two reasons for asking.

I have an Armi San Paolo "Navy" 44 Sheriff's model.  Not sure when it was made.  But I'm measuring a full .020" difference between the axes of the chambers and the barrel axis!  I'd like to confirm that in modern C & B revolvers like an Uberti the chambers and barrel are closer to being coaxial.

Second reason is more out of curiosity and a quest for useless knowledge.  On the original Richards I conversions some revolvers used the original rebated cylinders which were bored out for the .44 cartridge.  I'd like to know how thin the metal was over the chambers in the rebated portion of the cylinder.  I know the chamber diameters and I know the diameter of the rebated part of the cylinder.  I still need to know the center to center distance from the arbor to the chambers.  Next best thing would be C to C distance of arbor to barrel axis on an original Richards or original 1860 Army.

I know that Colt began making new rebated cylinders for the conversion revolvers and those cylinders were a bit larger in diameter.  And the Open Top revolvers did away with the rebated part altogether.