Iver Johnson 22 Supershot 9

Helka

Helka

CGN Regular
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Location
Guelph,ON
Bought this off a friend a year ago. First time out I constantly had misfires. My range has the 5 shot rule and I would have at least 2 of 5 misfire.

Inspected the cylinder and noticed indentations in the cylinder from dry fires. Also the firing pin seems deformed.

So my question is: is it possible the indentations in the cylinder where the firing pin hits is not allowing the firing fin to hit all the way as the casing will form into the indent. The gun was manufactured in ‘32 and I don’t know where to start to try and acquire a new firing pin. Quick google didn’t return any results for me.

I was thinking possibly using some JB Weld to fill the tiny indents and see if that works. Don’t want to butcher the gun tho.

Here is a picture of the cylinder.

4B35B6F5-F6E4-49B3-99F5-BE5B53454A65.jpg
 

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Neat revolver. If the firing pin is messed up that's the first place I'd be looking to fix. I wouldn't be JB welding anything until I knew for sure that's the problem.
 
Suther said:
Neat revolver. If the firing pin is messed up that's the first place I'd be looking to fix. I wouldn't be JB welding anything until I knew for sure that's the problem.
Click to expand...

Agreed, problem is likely the firing pin. As long as the indents don't prevent loading and extraction, leave them alone.
 
if the firing pin in on the hammer have someone tig weld it and then file it down to the right size and shape. if its mounted in the frame then have someone machine a new one. there is tool to inron out rimfire cylinders too this will fix the indents without removing any material
 
antiqueguy said:
if the firing pin in on the hammer have someone tig weld it and then file it down to the right size and shape. if its mounted in the frame then have someone machine a new one. there is tool to inron out rimfire cylinders too this will fix the indents without removing any material
Click to expand...

The chamber iron will fix it if the edge is peened and sticking into the chamber area, but that doesn't look to be the problem here as the OP mentions ftf not FTE or chamber.
 
I used a tool to “iron” the cylinder slots out. I forgot I did have issues before loading cartridges in certain slots. Now cartridges fit well in each cylinder. Haven’t had a chance to take it out. Hoping to take it out this weekend along with my new GSG-16
 
They have parts at numerich, some stuff is the same as the 32 top break, don't know about firing pins, but I've ordered parts for my 3rd model 38s&w.
Very small pistols though, even my large frame with 6" barrel fits in some of my pockets, good luck
 
UPDATE- took the gun out on Sunday and with the ironing of the cylinders I went from 2-3 out of 5 shots misfiring to 1 out of 50. Much better.
 
Helka said:
UPDATE- took the gun out on Sunday and with the ironing of the cylinders I went from 2-3 out of 5 shots misfiring to 1 out of 50. Much better.
Click to expand...

Pretty likely that the damage to the edge of the cylinders was hanging the cartridges up, that they were not fully seated. They then will move forward when struck by the pin, absorbing much of the limited energy that is supposed to fire the primer compound.

It does not take a lot of movement to do this.
 
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