Bad half cock in 1851 .36 cal Pietta made in 2020

[mushka]

I took my 1851 out of the safe to clean and was cycling it for function and when cocked to the half cock to rotate cylinder, the cylinder was locked into the full cock position, would no rotate. Happened on all the way around.
What would the probable cause of this malfunction? I know nothing the mechanisms of this revolver.

 

[M. De Land]

I took my 1851 out of the safe to clean and was cycling it for function and when cocked to the half cock to rotate cylinder, the cylinder was locked into the full cock position, would no rotate. Happened on all the way around.
What would the probable cause of this malfunction? I know nothing the mechanisms of this revolver.

I wonder if the bolt leg has snapped off or if it has chewed up the cam so it can't lift ? At any rate the gun needs take down to thoroughly map out trouble and fix.

 

[ThemisHadAFlintlock]

I took my 1851 out of the safe to clean and was cycling it for function and when cocked to the half cock to rotate cylinder, the cylinder was locked into the full cock position, would no rotate. Happened on all the way around.
What would the probable cause of this malfunction? I know nothing the mechanisms of this revolver.

Try slightly loosening the trigger guard screw.

 

[wiscoaster]

Try slightly loosening the trigger guard screw.

Yes, good first trouble-shooting step because it sounds like a mis-position of the trigger group with the lock works. Been there done that during a build resolving an issue that sounds just like that.

 

[Bad Karma]

There are no bad half cocks. They’re just misunderstood.

 

[hawkeye2]

Since all the parts are contained in the frame on an 1851 the trigger guard or its screws have no effect on the issue nor can the relationship of the trigger group to the lock works be changed. I suspect, along with M. De Land, that the problem lies with the bolt arm and hammer cam.