Timney trigger... light primer strikes?

[Chaotik]

I was at the range today and a friend was shooting his new Remington .308 rifle with a Timney trigger. He was shooting his own reloads and was using Winchester Large rifle primers.

Anyway, he was finding that many of his reloads were not firing, although clearly you could see on the ejected round a primer strike.

The interesting part of this is that a few weeks ago with my own rifle the exact same thing happened to me with an identical Timney trigger (model 510) and also using Winchester Large rifle primers. I suspected that it was the trigger, and in fact tested the dozen or so rounds that failed to fire in my rifle with the Timney trigger in another .308 Remington with the standard X-Mark Pro trigger…. All rounds fired flawlessly.

So is this something that is common with Timney triggers, or is it the combination of that trigger with WLR primers? I am asking because I had purchased another Timney trigger that I was thinking about installing in my 6mmBR, but now I am having second thoughts…

Thanks for your input and advise.

Bob

 

[Lapua40X]

The interesting part of this is that a few weeks ago with my own rifle the exact same thing happened to me with an identical Timney trigger (model 510) and also using Winchester Large rifle primers. I suspected that it was the trigger, and in fact tested the dozen or so rounds that failed to fire in my rifle with the Timney trigger in another .308 Remington with the standard X-Mark Pro trigger…. All rounds fired flawlessly.

Bob

The "other rifle" you used to test the rounds that failed to fire also had a different bolt and firing pin so I wouldn't be too quick to blame the trigger.
In fact, IMO, the trigger would be the last thing I'd expect to create the problem you describe.

 

[Chaotik]

Thanks!
There is much that I do not know...

I guess the reason I suspected it might be the trigger was that on my rifle I had the Remington X Mark Pro trigger installed for several months without any issues before putting in the Timney trigger. The only variable that I changed (at least that I am aware of) was the trigger; and then I got the failures to fire with that rifle.

 

[BigDMT]

The trigger sear could be a little different and not cocking the firing pin back as far, but there should still be enough force there.

Might be that the firing pin protrusion depth frim the bolt face could be a little too short as well. Should be set right around .060 when discharged. Pretty simple to adjust.

 

[AusFclass]

Another possibility is during firing the trigger sear could be rubbing on the bottom of the firing pin sear causing the firing pin to be slowed down before it gets to the primer.

 

[Scott Harris]

Normally I'd suspect the firing pin, but since the problem only occurred after changing triggers that definitely helps narrow the suspects. Why don't you put the Remington trigger back in and see if the problem goes away? I'd also check the firing pin strength and make sure it is at least 24lbs...this is a common problem.

 

[lurcher]

I had a factory model 7 rem with the pre-xmark pro trigger that did this. Smith said head space was out and set the barrel back - no improvement, fitted a speedlock kit new pin and spring and polished the inside of the bolt body -no improvement by this time it had cost me a several deer -talked to another smith he said change the trigger something about the sear dragging? he had seen this before changed to a rifle basix -problem solved immediately