Double set trigger issue

[Cory Joe Stewart]

Hello all. 

I am working with a set of the small double set triggers from RE Davis.  Good quality as always so there is nothing wrong with the set.  It is me.

First I inlet the triggers too deep and they were pressing against the sear even in the rest position.  So I glued in a shim to pull them out a bit.  Now they work great as long as I hit the back trigger first.  I prefer to have them also fire the gun by just going to the front trigger first. 

What my cause this problem? 

Coryjoe

[Dennis Glazener]

Sounds I'll like not enough clearance between trigger bars and sear bar. Either trim a little off the shims or file a little off the trigger top of the trigger bars/levers. If need be you can grind some off the sear bar where it contacts the trigger bar/lever.
Dennis

[greybeard]

You can also file a bit off the shelf that the mainspring rides on or file a bit off the pressure tip of the spring and polish both surfaces. Both off these treatments will lower the action of the back trigger. If the front trigger is too high then your option is to file or grind it down a bit. Bob

[bobw]

From what I have seen when the trigger bars are to deep in the stock they hold the sear out of the tumbler sear notch and possibly even the half cock notch.  This will not allow you to cock and hold the lock.  What everyone else said will reduce this bars depth and help this situation.  I maybe wrong but it sounds like the rear trigger is setting the front, which is correct.  The front trigger should be free when unset to raise up and trip the sear arm.  Is there possibly wood that needs to removed to allow this movement?

[D. Taylor Sapergia]

You can also heat the sear's tail red, bend it up at the "L" and then level again at the tip...in short, raise the sear's bar away from the triggers.

[Mark Elliott]

Do you mean that the front trigger isn't hitting the sear bar since you backed the triggers out?   If so,  you will have to put them back in deeper.   The problem with that is that at some point, the rear trigger holds the sear open.  Is that the problem you were having when the triggers were in deep.   If so,  I solve that problem by installing a limiting screw under the end of the rear trigger spring.    This was not an issue with the original double set triggers as they rarely had a bar on the front trigger to trip the sear.   It is really hard to setup triggers and locks so that both triggers work well.   You either need to bend up the sear bar or install the limit screw in the trigger.  

[Cory Joe Stewart]

Thanks everyone,  I think the solution is to take more material off of the set trigger and place it back further into the stock and give it a go. 

I appreciate it.

Cory Joe Stewart

[EC121]

Put a 4-40 screw under the high point of the mainspring and adjust it to let the trigger bar drop some.  The trigger will still work fine and the front trigger will also work.  If you use a regular headless set screw, it can be made to disappear into the trigger bar.  You can also put a shim under the spring  that will be invisible.

[Smoketown]

Coryjoe,

The top one has pictures.   

https://www.trackofthewolf.com/pdfs/catalog/page_352.pdf

http://americanlongrifles.org/forum/index.php?topic=23961.0;wap2

Cheers,
Smoketown

[Bob Roller]

This type of problem usually pops up because of mismatched parts and not making ANY measurements.calculations before
starting the inletting.

Bob Roller

[Cory Joe Stewart]

That information is very helpful.  I still think it is the depth that is the issue.  Or that there is something that the trigger is hitting inside.  I have not been able to get out to my shop today to try out that suggestion.  I centered the sear on where the front a rear trigger meet.  I did it the way Hershel House describes it by bringing the triggers up and where they make a V that is where I placed the sear. 

[EC121]

Smoke the triggers in a candle flame and install them.  Snap them a few times and look for black spots.  Should show up what is hitting.

[Pete G.]

The rear trigger should not touch the sear when they are both at rest. Several methods have been suggested, all of which will work. Choose the method that appeals to you and go with it. My personal favorite is to file the area on the kickoff spring where it bears on the rear trigger (assuming there is enough arch in the spring).