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MartyK2500

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Today I had a trigger issue creep up on me.
May be coincidence or not, but it was my first time out in sub-zero temperatures with this setup.
Issue being, a delay between trigger break and firing pin break, like an ultra long lock time.
Here are the facts...

Action shot 180 rounds before this appeared, today it worked well for the first 10 rounds I got the gun out of the case, then I let it sit for 30 mins in the cold before firing again, issue had started right at that moment.
The delay is also clearly felt and seen during dry firing (primer issue out of the question now).
Completely stripped the bolt/firing pin setup, reassembled in warm shop, still does it. Everything has been inside for 2 hours now too, cold is not an issue for sure now (although cold may have caused it).
I have 2 Bighorn Origins each sporting their own TT diamonds, we'll call them #1 and #2 (#2 is the one with the issues), and did the following testing...
#1 action and trigger functions fine with both bolts
#2 action and trigger do not function well with both bolts
#1 action does not function well with #2's trigger, with both bolts
#2 action functions well with #1's trigger, with both bolts

In this case I believe I have covered my bases,
Anything I may have overlooked?

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TT will sort you out. Out of the 5 triggers of theirs I've had, I had one start doing the same thing after day 1 of a 2-day match in a torrential downpour. Lighter fluid cured it temporarily but it came back. Contacted TT and they sent me a replacement. Had no issues with the replacement and it's well over 10k rounds now.
 
Just did the lighter fluid and compressed air trick, seems like I’m (temporarily?) back in action with that rifle.
We’ll see what tomorrow reveals...
 
I like my TT's a lot but wish they had sear height option like Bix n' Andy.

two issues I've encountered:

1. one of my rifles the bolt lift is much heavier than it should be. It's a really nice older 700 hunting rig. With the original Walker (which was by far the best Walker I've seen and was reluctant to swap) had a slightly heavy lift. The TT Special made it heavier.

2. on a couple 700's I can't get some TT Specials down to even 2 pounds without it dropping the firing pin while testing. I have to pull it up to about 2 1/4 pounds so appears sear engagement is too light.

I have a single stage TT Diamond in a GA Precision (built on a 700 action) and can get that down to whatever I realistically want. Not a direct comparison to the others but I'm disappointed I can't get the TT down to 2 pounds in some of my 700's. Heck, I can get some of my Walker triggers safely down to 2 pounds same rifles.

All of my 700's except for the GAP (not messing with it, it's too good) have Gre-Tan firing pin shroud assemblies.

I have yet to contact TT on these concerns but my dealings with them in general have been awesome. Fantastic company to deal with all the way around.
 
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madashell said:
I like my TT's a lot but wish they had sear height option like Bix n' Andy.

two issues I've encountered:

1. one of my rifles the bolt lift is much heavier than it should be. It's a really nice older 700 hunting rig. With the original Walker (which was by far the best Walker I've seen and was reluctant to swap) had a slightly heavy lift. The TT Special made it heavier.

2. on a couple 700's I can't get some TT Specials down to even 2 pounds without it dropping the firing pin while testing. I have to pull it up to about 2 1/4 pounds so appears sear engagement is too light.

I have a single stage TT Diamond in a GA Precision (built on a 700 action) and can get that down to whatever I realistically want. Not a direct comparison to the others but I'm disappointed I can't get the TT down to 2 pounds in some of my 700's. Heck, I can get some of my Walker triggers safely down to 2 pounds same rifles.

All of my 700's except for the GAP (not messing with it, it's too good) have Gre-Tan firing pin shroud assemblies.

I have yet to contact TT on these concerns but my dealings with them in general have been awesome. Fantastic company to deal with all the way around.
Click to expand...

I also prefer BnA's over TT triggers. TT's are nice, but I like the feature set and performance of BnA's better.

I had the same experience with a TT trigger and a TL3 action - too much sear engagement, resulting in super heavy bolt lift and close. The nice thing with Bighorn/Zermatt actions, is that you can send them your action and they will time it to the specific trigger for free/minimal cost. However, I prefer to have the ability to do that at home with ease. Apparently the new 2 stage TT triggers are having an issue with too little sear engagement - which is something a gunsmith or TT will have to rectify for you.

That's the clever feature of the BnA tacsport triggers, the end user can adjust the sear engagement, and if the range of the adjustment isn't enough, they have different height top sears and they/Bullet Central can tell you the exact top sear you need for the action you are running. You can time the trigger at home yourself, along with a plethora of other adjustments you can make on the BnA trigger. The trigger and action interface plays a huge role in how your action feels and functions. Obviously optimizing that interface is going to optimize the feel and functionality, which is what trigger timing does.

I have a 2 stage TT in my hands, and in my opinion it was a huge missed opportunity by them to not include the ability to adjust sear engagement. You also can't adjust pull lengths either, which is another feature that I would've liked to see included. A 2 stage TT won't be replacing my BnA 2 stage Tacsports anytime soon, but I can see the TT being more appealing if you would rather not tinker. You can only adjust the stage weights, which depending on your preferences, could be a pro or con.
 
Although I really like my TT single stages, your reasoning is exactly why I'm not even going to bother trying their 2-stage. I'll just go straight to B&A and know I'll be where I want to be out of the box as it were.

On my GAP with 700 action it's clear to see they have timed the sear/cocking piece engagement. It's so perfect I'd put it up against any 700 after market footprint action. And even thought I've swapped out the tuned Walker it came with many years ago with a TT Diamond single stage, the timing work GAP did on it happens to work perfectly with the TT.

I won't be getting rid of my TT triggers (8 so far), but I'm not so sure I'll be purchasing anymore at this point either.


kthomas said:
I also prefer BnA's over TT triggers. TT's are nice, but I like the feature set and performance of BnA's better.

I had the same experience with a TT trigger and a TL3 action - too much sear engagement, resulting in super heavy bolt lift and close. The nice thing with Bighorn/Zermatt actions, is that you can send them your action and they will time it to the specific trigger for free/minimal cost. However, I prefer to have the ability to do that at home with ease. Apparently the new 2 stage TT triggers are having an issue with too little sear engagement - which is something a gunsmith or TT will have to rectify for you.

That's the clever feature of the BnA tacsport triggers, the end user can adjust the sear engagement, and if the range of the adjustment isn't enough, they have different height top sears and they/Bullet Central can tell you the exact top sear you need for the action you are running. You can time the trigger at home yourself, along with a plethora of other adjustments you can make on the BnA trigger. The trigger and action interface plays a huge role in how your action feels and functions. Obviously optimizing that interface is going to optimize the feel and functionality, which is what trigger timing does.

I have a 2 stage TT in my hands, and in my opinion it was a huge missed opportunity by them to not include the ability to adjust sear engagement. You also can't adjust pull lengths either, which is another feature that I would've liked to see included. A 2 stage TT won't be replacing my BnA 2 stage Tacsports anytime soon, but I can see the TT being more appealing if you would rather not tinker. You can only adjust the stage weights, which depending on your preferences, could be a pro or con.
Click to expand...
 
TT replied to my email and defect trigger is in the mail.
Too much sear engagement with Origin actions they suspect, they will build me a TT diamond specifically for Bighorn actions.

Almost feel like putting the new trigger in my 6.5 and putting my older trigger in this .308, as my TT diamond that is working correctly, does have a heavy bolt lift.
For service rifle on my belly it ain't an issue, when doing some positional training I noticed that heavy bolt lift = not good.

So far their service is far above the market standard, if they do the things they said they would... we'll see!
 
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