1858 conversion: need technical advice

Hey All,
It's been a long while since I posted here, but I've frequently stopped in to read all the posts.

Just bought a new Cimarron (Uberti) 1858 factory conversion (45LC).

I've owned many revolvers, but never seen the following problem.

When I cock the hammer, the entire cylinder "dips down" along the horizontal plane within the cylinder frame window....and then comes back up when the hammer reaches full cock.

The cylinder nearly "bottoms out" within the cylinder frame window, but is not making contact with the frame.

As I said, by the time full cock is reached....everything is fine.

I haven't even fired this yet, as it just came in.

Any advice? I will not have a chance to shoot it until next week.

What parts would need to be.....out of spec, for the entire cylinder to travel downward while cocking?

Thanks!

Thanks for the reply!
I'm away for the weekend, so cannot check the revolver out, but will take your advice when able.

Under lockup, the cylinder feels normal, with very little movement or play....

I'll get it out to the range next week, and make sure it functions normally.....

I know my description of the "problem" wasn't too clear.....but I've never experienced a revolver where the cylinder seemed to move downward and then back up while being cocked!

Thanks fellas!
I'll be home within a day, and will check into things again....

Probably shouldn't have posted until I was at home, so I could have checked out all of your solutions and advice!

Happy Memorial Day! Big salute to our fallen soldiers/sailors/airmen/marines!

Update:
The cylinder pin is definitely seated all the way.

The cylinder definitely "dips" down while action is being cocked.

I cannot remove cylinder pin, due to 5.5" barrel being too short, and thus ram lever latch is "in the way".

I have contacted Cimarron to see about a call tag, and will provide info here as the repair process happens.

My instinct tells me that the spot where the cylinder pin stops or rests at full seat...is oblong or out of spec.

As soon as the hammer starts back and the cylinder stop drops away...the cylinder drops with it.

44 Dave said:

I cannot remove cylinder pin, due to 5.5" barrel being too short, and thus ram lever latch is "in the way".
Good reason to stick with 8" barrel.
Does the original cylinder do the same thing? The flat on the bottom arbor could be excessive or the cylinder bore just a little oversize.
If it is the arbor and the latch not dovetailed you would need professional help to unscrew the barrel enough to remove the arbor.

Click to expand...

The "original" cylinder is the only cylinder in discussion, as this is a factory conversion, not a black powder revolver.
The factory conversions are slightly larger than the black powder and a black powder cylinder will not fit in them.

The revolver is on the way back to Cimarron's gunsmith as we speak!