Gunsmithing Triggertech Diamond 2 Stage issue

[Roadrace33]

I’ve never had this issue before. I just bolted together a new impact 737, 25x47 barrel, and Triggertech diamond 2 stage.

Every 7-8 cycles of the bolt, I get this odd trigger feeling where all of a sudden it’s not a 2 stage. It feels like a single stage, and then just breaks randomly. Like you go to pull for that first stage, and wham, it fires. I’ll attach a video somewhat describing it.
I’ve tried adjusting the weights much heavier with no luck. Tried a different bolt aswell.

I’ve got like 6 of these adjusted waaaay lighter than this, never a single issue.

Bad trigger?

 

[Roadrace33]

I was promised by a few friends this was a pull weight issue. However, I triple checked. I have adjusted 1st and 2nd stage multiple times, seperately, and the issue is still there. Sometimes it takes 20 cycles of the bolt, but it comes back no matter what. It seemed to go away when I tightened it up to like 3-4 lbs, it took about 60 cycles of the bolt, but I did have one instance with it tightened up that high aswell. So it seems it’s incorporated with something in the trigger that is tied to the weight of the adjustment.

Sent an email and the video to TT. I’ll stop at my local shop today and grab a new one, toss it in and see what happens. I assume it’s just a dud.

 

[Roadrace33]

Called TT. They told me to flush the trigger.
I stopped by my local guy, he just handed me a trigger to try. Same thing, 2 stage diamond. Tossed it in, dry fired about 20, then fired about 25 rounds. Then when I just was about to wrap it up, it did it again. So I stopped, thinking maybe, somehow it was an issue with a certain case or round somehow. Chambered a different round, and it was fine. So I re chambered the round that gave me the issue, and it was totally fine. So I don’t think it’s a case or round issue. So it seems as if it’s doing it less, but the issue is still there.

Kinda lost. Surely it can’t be an action issue? The pins slide right in the trigger hanger like they would normally. Visually, all the machining on the action looks perfect like the other impacts I’ve got. I’m missing something. I have to be.

 

[TahoeDust]

Do your run the same trigger in your other impact actions? Have you tried this trigger in a different impact action? I have a TT Diamond 2 stage in my Origin action and have not experienced this.

 

[Roadrace33]

Do your run the same trigger in your other impact actions? Have you tried this trigger in a different impact action? I have a TT Diamond 2 stage in my Origin action and have not experienced this.

This is my plan tomorrow. I have 4 impacts with this exact trigger, so I’m gonna try it. I love this trigger setup. Never had a single issue. It’s hard to believe it’s an action issue either, because what could be wrong? The trigger is sitting too low and it’s not getting reset perfectly? Maybe it’s as simple as that aluminum trigger hanger impact uses.

It is such a weird feeling because you’re expecting that initial take up of slack, and wham, it’s fired.

 

[1911Shootist]

I stopped by my local guy, he just handed me a trigger to try. Same thing, 2 stage diamond. Tossed it in, dry fired about 20, then fired about 25 rounds. Then when I just was about to wrap it up, it did it again.

So the symptom was present with both two different triggers?

What are the pull weights set at?