Gang,

I ran across an interesting quandary. This fellow indicated that this unit he keeps at his store misfires since he spilled coke on it.

Well after ultrasonically cleaning it, the unit is back to norm. However, I found that the Center Pin is bent and so the cylinder rotated concentrically. Okay replaced the pin; still intermittently misfire on the fifth round.

Next, I found that the Hammer binds on its forward travel. After polishing the Firing Pin, it by itself does not bind inside of its hole. However when the Firing Pin Spring is installed together, the pin's forward motion is hampered. Ah, ha....

It appears that as the spring compresses during the travel forward phase; one of its coils (probably one of the top ones) binds on the inner ridge of the frame's pin hole.

I do not think that a new spring from the factory would necessarily solve the problem. I happen to think that a slightly tighter wound spring replacement would definitely solve the problem.

Trouble is I do not know if this condition might be a unique problem with this particular unit or perhaps the model line. Second, I am not in the spring making business, so I cannot make a custom spring that would have the precise tolerance I think it needs. Thirdly, I hesitate to polish the inside hole for fear of altering its specified [factory] dimension(s).

Questions:

1. What dimensional and compacting measurements are used to denote a spring precisely (i.e. wire thickness; outside dimensions; # coil winds)?

2. Can an existing spring be altered by somehow winding it slightly tighter (and retain that new property)?

Objective is to precisely travel forward without binding; thus fully engaging the primer each and every instance. What are your thoughts? TIA....

Alex,

Go to <www.brownells.com> and check out the spring kits offered by Wolff. Or, contact Wolff directly at <www.gunsprings.com> and see if they have the spring you are looking for. Replace the mainspring while you're at it.

Is the gun misfiring on the same hole every time?

Does it misfire on handloads, factory or both?

Malm