Hi Volks_R_Us,
I would suggest having your firearm looked at by a competent smith with experience with revolvers.
You have mentioned numerous issues which may or may not be problems.
-The cylinder get out of timing, If I apply some pressure with my thumb it, while pulling back the hammer
Where are you applying pressure with your thumb? If you are applying thumb pressure to the cylinder when you pull back on the hammer you will induce DCU (doesn’t carry up or improper timing) on a properly functioning revolver.
If it is correctly diagnosed DCU and not user induced a few of the typical culprits could be:
- Worn ratchet
- Locking bolt out of alignment
- Burr on yoke
- Rod run out
- Yoke out of alignment
- Center pin out of alignment
- Hand skipping (worn or modified)
- Faulty stop action
- Debris under extractor star
- No front gauge
-The cylinder locking slot show some wear and are burred out.
If your cylinder stop window is burred, this may be your DCU problem but would need to be looked at as it’s not a common complaint.
-The ejector rod is slightly crocked even if it as been replace with a bran new one
Could be rod run out, would have to be looked at to be sure. If severe could cause DCU.
-The cylinder extractor star show some sign of wear where the hand touches
The extractors are fit at the factory and will have file (on older models) or cut marks (on newer models). If this is the wear you are speaking up, it’s common. If the cylinder is forcibly held while the trigger is pressed the hand will re-cut the extractor star and may now fail to throw the cylinder far enough to engage the cylinder stop (DCU).
-The Forcing Cone edge are rounded on the left side and sharp on the right for some reason.
Inside or outside edge? This would have to be looked at to determine if it is in fact a problem. If you have proper front gauge and the forcing cone passes plug test this may not be a problem at all. If you don’t, it could be causing DCU.
Improper timing will lead to lead shaving as you shoot (you may feel it blowing back in your face).
With the firearm unloaded and cylinder closed slowly press the trigger. You should hear 2 clicks before the hammer falls. Sometimes the second click happens only moments before the hammer falls so pay attention. Do this six times for each chamber, if all 12 clicks are present your timing should not be an issue. If the hammer falls and you are now able to apply slight pressure on the cylinder and rotate it into a locked position (second click) then the timing is off.
Take care and let us know how you make out.