[frogomatic]

I've got a Tarus 94ss4 Revolver. About half of the time when shooting in double action it misfires, but never misfires in single action. I have been unable to figure out the problem, and I'm looking for some advise on what could be causing the misfires. Anyone have any suggestions?

[frogomatic]

a little more information...

after some more function testing, the problem seems to be exclusive to chambers 6, 7, 8, 9, and 1. with 7, 8, and 1 being the most problematic, and occasional problems with 6 and 9.

Did a lockup test and under resistance it fails to lock every time on 7, 8, and 1. With an occasional fail on 6 and 9. It does lock every time on all the other chambers. this leads me to believe it's either the extractor rachet, or the cylinder itself.

I've inspected both, and I cannot see any defects. I also checked the hand, and the cylinder stop and both appear to be in working order.

I think it's time to go back to the booth for another round of test firing.

[rcmodel]

Cause it's a Taurus .22 RF?

Seems to be a very slim margin on reliabilty in DA with a stock spring even.
Maybe you need a new spring?

http://www.thehighroad.org/showpost.php?p=4253584&postcount=4

http://www.thehighroad.org/showpost.php?p=4255886&postcount=9

http://www.thehighroad.org/showpost.php?p=4255895&postcount=10

rc

[Jim K]

Has anyone tried to do a "trigger job" on that gun? It is pretty common for a gun with a small hammer to misfire using rimfire cartridges if the spring has been modified to give a lighter pull.

A lot of people think a .22 LR or .22 Magnum requires a lighter hammer blow than a center fire gun, but in fact the rimfires require a HEAVIER hammer blow.

Jim

[tblt]

replace the mainspring
I had this problem on an old RG pistol I put 2 small washers on the mainspring and that fixed my problem,

[frogomatic]

No evidence of an attempted trigger job. The problem does seem to be exclusive to specific chambers, which is why I'm thinking it's a rachet and/or cylinder problem.

I'm going out for a test shoot, and I will be keeping track of exactly which chambers are the problem. If it remains exclusive to certain chambers, then I'll know, but if it happens on other's as well I will then replace the main spring and try again.