Revolver question

Alfonso

Alfonso

CGN Regular
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Location
Okanagan
Hi fellas,

I know very little about gunsmithing but I thougt that maybe I could resolve this issue on my own.....

I have an older Ruby extra .22 (Spanish) in which 2 of the 6 cylinders are miss-fires, especially when fired as double action. The .22 shell primer is being hit and in fact you can't really see the difference between the miss-fired shell and the empties....Is there a way to tense up the action and make the hammer or firing pin make stronger contact with the primmer????

Thanks

Sorry for being ignorant!!! lol
 
Is it consistently the same 2 chambers that give this problem? If so, that may speak to some issue with the cylinder itself, but off hand, it sounds more like a problem with the ammo, than with the hammer. After all, the hammer seems to be hitting with the same strength each time. What ammo have you been using?
 
Main spring tension is to soft most likely. Try tighening it up and test fire it until it works. To tight and you won't be able to pull the trigger, so find a balance.
 
If it is anything like a S&W revolver there may be a small screw head on the front of your grip about where your little finger would go. Some people with S&W revolvers loosen this screw to make the trigger lighter. I believe it can lighten the trigger at the expense of unreliable ignition, which you seem to be experiencing.
 
Also to consider.
Cylinder gap and hammer fall. Is the firing pin the hammer itself? Is the pin worn?
In combination with a couple of too deep cylinder chambers, that would do it.

If it's always the same two, it pretty much guarantees that the cylinder is far from perfect, however, you can probably get it to fire them with a little careful tinkering..
 
If it is the same 2 chambers that fail to fire it could be that the cylinder does not spin true, or it could be that the rim of the cartridge is not fully supported so that the hammer cannot hit the rim with enough force to set off the priming. More than likely this was caused by dry firing, so check for burrs or dents on the cylinder face around each chamber. If everything looks OK check the run-out of the cylinder as it turns.
 
More info...

Well, thank you all for your input. I have tryed tightening the trigger pull and nothing...When I look at the struck primer dimples on the 2 cartriges that dont go off, I cant really see a difference in the dent....but I do think that the hammer (which is the firing pin) maybe is making contact to close to the edge in general. So maybe that problem coupled with 2 bad chambers could be the problem. Is there anything I can do so that the hammer hits the primer 1 mm closer to the centre??

Thanks
 
Are you sure those two chambers aling well with the barrel (and the hammer)
at the moment of firing? If the cylinder hasn't completed its rotation the
firing pin hits a little to side so a little to the exterior of the rim. Check
cylinder notches corresponding to those chambers (opposite side of cylinder),
also check hand and ratchet for wear.

Jocelyn.
 
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