Dangerously Sensitive Trigger / Hammer doesn't stay cocked (Single Shot Iver Johnson)

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I just bought an Iver Johnson which has an extremely sensitive trigger, to the point where you barely touch it and it releases the hammer. When the shotgun is oiled, the hammer won't even stay cocked, it just goes back forward immediately.

This is a single action trigger, meaning you need to #### the hammer, and then pull the trigger.

From my understanding, the trigger is not holding the hammer in the cocked position because it is well used, and the once sharp edge has become rounded and unable to withstand the force of the hammer spring.

Is this a fair assessment?

If so, I am thinking that filing down the rounded "ledge" in the the trigger group would be sufficient to rectify the problem. Is this correct?

The parts (including the trigger group) are visible here:
0770zCHAMPION.jpg


And here assembled:
IJ_Champion.jpg



Thanks a bunch in advance.

-###XX
 
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I had a Champion just like yours that I sold here on CGN. The hammer was what needed replacing as it was unsafe to shoot with a similar prob like yours. This was a $30. fix.

You'd be better served with a new hammer, or trigger, or both. I wouldn't cut the engagement surfaces for a number of reasons to say the least.
 
Easy: do you know where I can find a new trigger assembly for this shotgun?


Anyone else have experience with this problem?
 
Also, they seem to have the buttplate that I believe you were looking for in the exchange forums recently. Or was that someone else I'm thinking about.
 
pardon?

i have a single H&R and love the old lady (more than my mossy 500a). The barrel itself weights more than M14 i traded for 500a. Strong action, ejector tosses empties a good 10-15 feet (dont point it at your face haha).
 
Filing might work for while, then it will go off by itself. Part replacement is a good idea. I had a PPK that would drop the hammer if you pushed the hammer, cracked sear.
 
you might also consider the cost - i have basically the same gun as you but it's mussing the bit after the forend between that and the receiver- it won't sell it as it was my grandfathers, but it;s only value really is as a mantle piece or wall-hanger- and it still works 100 %- trouble is , i've "graduated " far beyond that gun and i'm a little suspicious of the barrel , from what i can figure, it was made right at the end of the dasmascus era, and modern loads might not be safe to fire
 
I have a remington 870, jack.

I don't hunt; This is just a restoration of an old shotgun that has seen better days. You know, as a hobby--for fun.
 
Until you get it repaired, tie a tag to it to the effect "dangerous hair trigger" as a reminder to you, and a warning to others who might handle it.
 
That's a good idea, Andy... I'm going to finally take it apart tonight and see what needs to be done on it.
 
UPDATE: I fixed it with some grinding. About 30 seconds worth actually...

There was a single pin holding the trigger on which made it easy to remove. It was the "catch" (sear?) on the trigger that was obviously rounded over, so I just ground it down to a square edge again.

It'll do in the mean time, though I will look at getting a new trigger/hammer for this shotgun.
 
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