R700 FTF after timney install

[boyguan]

[TheReluctantCraftstronaut]

Timney has been very helpful with me in the past. I would call them first before taking in online advice. If it is related to the trigger, I would guess there's too much engagement on the sear, not allowing it to disengage completely, and adding friction to the mechanism.... Just a guess.

[boyguan]

Timney has been very helpful with me in the past. I would call them first before taking in online advice. If it is related to the trigger, I would guess there's too much engagement on the sear, not allowing it to disengage completely, and adding friction to the mechanism.... Just a guess.

Thanks. Just curious if it could be anything else. I have 500 rounds down and 0 FTF till the trigger upgrade

I love this trigger. 2/50 FTF

[LynnJr]

All a trigger does is it releases the firing pin assembly.

In your example it must be dragging on the cocking piece as that is the only part that makes any contact with the trigger.

[boyguan]

All a trigger does is it releases the firing pin assembly.

In your example it must be dragging on the cocking piece as that is the only part that makes any contact with the trigger.

Called timney. They said the sear is too short. Sending a new one.

[ar15barrels]

Cocking piece is dragging on the top of the sear.
Eliminate binding.

[ar15barrels]

Timney has been very helpful with me in the past. I would call them first before taking in online advice. If it is related to the trigger, I would guess there's too much engagement on the sear, not allowing it to disengage completely, and adding friction to the mechanism.... Just a guess.

Nope.
Sear engagement has nothing to do with the cocking piece passing the sear because the engagement ends when the sear trips.

[ar15barrels]

Called timney. They said the sear is too short. Sending a new one.

The sear is actually too tall and drags on the cocking piece.
I have had to clearance a lot of them to free up the bolt travel on trued guns with oversized bolts.

[boyguan]

The sear is actually too tall and drags on the cocking piece.
I have had to clearance a lot of them to free up the bolt travel on trued guns with oversized bolts.

[baih777]

You messed.with it after he tuned it. Shame on you.
Road.trip.

[boyguan]

Cocking piece is dragging on the top of the sear.
Eliminate binding.

Is the area your talking about in the red circle?

So when the rifle fires, the firing mechanism rides on top of the sear until it stops I assume. If there is some drag then it can slow it down? I assume there is no stop for the firing mechanism

[LynnJr]

Boyguan
Yes that's it in the red circle.
Look at the three pictures.
One shows the top of a Jewell trigger sitting in a towel. Notice it has a ramp on the top lever.
One shows a BAT bolt cocking piece that is kind of blurry. Notice it has a rub line on the cocking piece plus it has a matching ramp that mates up with the cocking piece.
In the other picture I put the trigger against the cocking piece.
When you pull the trigger shoe that top lever swings down in the back and the cocking piece rides over it. If there isn't enough clearance it will drag as it goes forward.
The lines you see on the side of that cocking piece are from the side plates of the trigger dragging on it.
Benchrest Shooters will put Delrin buttons on the bolt shroud so it can't tilt while others leave them as is.

[ar15barrels]

You messed.with it after he tuned it. Shame on you.
Road.trip.

Depends on how the new trigger times up, but it might need a new cocking piece if the new trigger over-times the cocking piece.

[ar15barrels]

Is the area your talking about in the red circle?

So when the rifle fires, the firing mechanism rides on top of the sear until it stops I assume. If there is some drag then it can slow it down? I assume there is no stop for the firing mechanism

If the cocking piece stays cocked with the new trigger, the problem will be related to the cocking piece RIDING the sear.
There needs to be clearance between the cocking piece and sear AFTER the sear drops for the striker to freely move forward.

My tuning does not effect that clearance.
My tuning moves the front-to-back location of the angled face of the cocking piece which is retained by the sear until the trigger is pulled.

[LynnJr]

And you guys can press on the top lever with your thumb and pull the trigger with your other hand. The back will drop down and the front is just a pivot point. When you let up your thumb the trigger resets itself.

Randall good catch on the sear being too long not too short.