Adjusting the GRT-III trigger

[Nomadic Pirate]

I had GRT triggers for almost a decade now but I've never touched them,
now I feel like adjusting them a bit.

I did go to the site and tried to read about it but honestly didn't get it much 

1st stage, tells you not to go to far one way or the other but not specifically in what direction to go to shorten or lengthen the 1st stage.

2nd stage, tells you to go counterclock wise to decrease creep, does that mean you lighten it too ?

Help a poor dummy here 

thanks

[Roadworthy]

I think the GRT III adjustment descriptions are really hanging up on semantics.  I believe what the instructions may call the first stage - the 0.050 Allen wrench adjustment is actually taking the play out of the trigger before beginning the first stage pull.  The adjustment screw actually adjusts the length of first stage pull - at least that's the way it seems to me.  The "fat pin" is the second stage of the trigger.  The geometry is such that the second stage actually pulls more easily than the first.  It is a true two stage trigger but the second stage is not adjustable and is strange in that the pull gets easier.

You can replace the whole trigger package with an NP2 trigger package.  I learned that from another member and did it with my Nitro Venom.  You will lose the so called anti bear trap unless you purchase NP2 linkage but the trigger package works well.  You are back to a long, stiff pull but it is easily remedied.  Replacing the trigger spring with a lighter one in conjunction with a bit of polishing and lubrication and the addition of four nylon washers turns it into a very nice trigger indeed.

[Nomadic Pirate]

I think the GRT III adjustment descriptions are really hanging up on semantics.  I believe what the instructions may call the first stage - the 0.050 Allen wrench adjustment is actually taking the play out of the trigger before beginning the first stage pull.  The adjustment screw actually adjusts the length of first stage pull - at least that's the way it seems to me.  The "fat pin" is the second stage of the trigger.  The geometry is such that the second stage actually pulls more easily than the first.  It is a true two stage trigger but the second stage is not adjustable and is strange in that the pull gets easier.

Thank you very much, that makes so much sense now.

just now I did some conterclock on the what is called 2nd stage screw and I definitely felt the pull getting longer but no lightening of the break.

Sure felt like I was working on the 1st stage rather than the 2nd stage.

[Roadworthy]

I have attached a rather primitive drawing.  You will note the screw labeled as first stage will do very little.

The screw labeled second stage CAN be the only screw activating the trigger.  Note the fat pin is displayed by a largish round hole.  When that trips the sear the trigger will fire.  If the "second stage screw" is turned in too far it will trip the trigger before the fat pin hits it.

If your screw is out far enough that the fat pin does the final release you will probably never feel it as the pull gets just a fraction easier before the gun fires.  The transition is very brief between the time the fat pin is activated and it fires the gun.  You should be able to see the leverage change in the drawing.  I thought I had a better one.  Perhaps I'll dig around a bit tomorrow.

[Nomadic Pirate]

I'm so confused,

So should I turn the labeled 1st stage screw clockwise to shorten it and the second stage screw also clockwise to reduce  the pull that seemed to get very long after I turned it anti clockwise yesterday ?

[lizzie]

Thanks for posting the diagram,  Thomas!
Excellent visual explanation for people such as m'self. Very helpful!

[A.K.A. Tommy Boy]

I have a Benjamin 1100 XL with a GRT-III Trigger in it.  I have it set so that with a very small amount of travel with a light pull and it will go to first stage. I can feel this happening through the trigger. I can feel the trigger reach resistance. After first stage is reached, a very slight pull again and the gun will shoot with very little trigger travel. This trigger requires concentration but makes for a very accurate shot as the trigger actuation is not causing the gun to move off target.         Best Regards  -  Tom

[Roadworthy]

I found installation instructions for the GRT III on the charliedatuna website (https://charliedatuna.com/GRT-III%20Trigger%20New.htm).

It seems you already have your trigger installed, and probably without reading the instructions.  I mostly did.  The installation instructions also have some good adjustment info which I never read.  That starts at about Page 3.  I never really read this either in all the time I was tinkering with the trigger.

There's really quite a bit of good info there.  The website itself is quite informative and little has changed since Bob was running the show.

[Old Corps]

I'm so confused,

So should I turn the labeled 1st stage screw clockwise to shorten it and the second stage screw also clockwise to reduce  the pull that seemed to get very long after I turned it anti clockwise yesterday ?

 Turn the 1st stage screw (.50 allen head) COUNTERclockwise to shorten it. Turn the 2nd stage screw clockwise to shorten it's pull.
 Good luck!

 Ed

[Nomadic Pirate]

I'm so confused,

So should I turn the labeled 1st stage screw clockwise to shorten it and the second stage screw also clockwise to reduce  the pull that seemed to get very long after I turned it anti clockwise yesterday ?

 Turn the 1st stage screw (.50 allen head) COUNTERclockwise to shorten it. Turn the 2nd stage screw clockwise to shorten it's pull.
 Good luck!

 Ed

Thanks brother, that's what I needed .....sorry just a dumb trigger person

[Back_Roads]

 I thought Trigger was a Horse 

[Old Corps]

I thought Trigger was a Horse 

Now you're showing your age!

Ed

[A.K.A. Tommy Boy]

I thought Trigger was a Horse 

Now you're showing your age!

Ed

Showing his age....Hey now hold on here a minute.  I remember Trigger ...and Buttermilk...and Bullet..and Nelly Bell....and...................... 

[buddyb]

This is what I was looking for on the trigger adjustments.

Also I liked the trigger is a horse statement.