I have a Defiance action and CG Jackson trigger and there is a noticeable click midway into closing the bolt. I believe it is a trigger timing issue. Is this a big deal or an easy fix? I certainly don't want to compromise safety but the click is pretty noticeable.
Timing a Trigger: a big deal?
- Thread starter Scott Harris
- Start date
You need to look at all the related parts and get acquainted with the way they interact as you open and close the bolt and pull the trigger. The related parts are :
The cocking ramp on the bolt.
The cocking piece on the striker assy.
The bolt plug [ aka the bolt shroud ].
The slot in the bolt plug that the nose of the cocking piece rides in. The nose is the part of the cocking piece that rides the cocking ramp of the bolt when you lift the bolt handle.
The part of the trigger that the cocking piece bears against when you close the bolt. When you pull the trigger this part of the trigger drops down allowing the striker assy to fly forward and fire the cartridge. When the cocking piece is taken up by this part this is called the 'hand off'. The striker assy is being handed off from the cocking ramp of the bolt to the trigger. The hand off is the main part of the timing of the action.
You also need to uncock and recock the striker assy with the bolt removed from the gun. Sometimes you will find that the problem is in the striker assy or with the cocking ramp.
There's lots going on in a small space when you get into this aspect of action work and you HAVE to have a complete understanding of all the interactions before you start removing metal.
The cocking ramp on the bolt.
The cocking piece on the striker assy.
The bolt plug [ aka the bolt shroud ].
The slot in the bolt plug that the nose of the cocking piece rides in. The nose is the part of the cocking piece that rides the cocking ramp of the bolt when you lift the bolt handle.
The part of the trigger that the cocking piece bears against when you close the bolt. When you pull the trigger this part of the trigger drops down allowing the striker assy to fly forward and fire the cartridge. When the cocking piece is taken up by this part this is called the 'hand off'. The striker assy is being handed off from the cocking ramp of the bolt to the trigger. The hand off is the main part of the timing of the action.
You also need to uncock and recock the striker assy with the bolt removed from the gun. Sometimes you will find that the problem is in the striker assy or with the cocking ramp.
There's lots going on in a small space when you get into this aspect of action work and you HAVE to have a complete understanding of all the interactions before you start removing metal.
Thanks for the info. I have 3 other Defiance actions and this very trigger works flawlessly with them. I tried my other CG triggers: all with the same results. I love that trigger and will change actions before triggers. 
I do recall Glen telling me they had "improved" their bolt shroud. I sent it back to Defiance and will let them sort it out.
I do recall Glen telling me they had "improved" their bolt shroud. I sent it back to Defiance and will let them sort it out.[quote author=rayjay
]There's lots going on in a small space when you get into this aspect of action work and you HAVE to have a complete understanding of all the interactions before you start removing metal.
Rayjay,
VERY good point. But it seem to me metal addition could well be the solution instead too.
From Scott’s explanations, I think that the FP travel is too short, resulting in a gap between the cocking notch of the bolt and trigger sear. When closing, the transfer of the FP sear dem rest on the volt to the trigger sear occur then somewhere diring bolt rotation andtead as at the start of it when camming helps.
As Scott has several identical actions, the others working properly, I suggest him to make comparative measurements of the FP travel, which (from memory) should be on the Remmies .270’. On a shrouded action, this measurement is easily made from the rear, measuring the difference between cocked and fired positions.
If the FP travel is shorter on this one, the cause can be either:
-Crosspin holes on receiver too much forward.
-Crosspin holes too far from receiver centre. Distance centre to centre on the Remington is .520’.(resuming those measurements are identical on clones?) This would result in smaller than normal sear engagement.
-Sear point on the FP too much backwards. Most possible cause. Either change of sear piece or have metal added on sear point to achieve the normal FP travel.
R.G.C
]There's lots going on in a small space when you get into this aspect of action work and you HAVE to have a complete understanding of all the interactions before you start removing metal.
Rayjay,
VERY good point. But it seem to me metal addition could well be the solution instead too.
From Scott’s explanations, I think that the FP travel is too short, resulting in a gap between the cocking notch of the bolt and trigger sear. When closing, the transfer of the FP sear dem rest on the volt to the trigger sear occur then somewhere diring bolt rotation andtead as at the start of it when camming helps.
As Scott has several identical actions, the others working properly, I suggest him to make comparative measurements of the FP travel, which (from memory) should be on the Remmies .270’. On a shrouded action, this measurement is easily made from the rear, measuring the difference between cocked and fired positions.
If the FP travel is shorter on this one, the cause can be either:
-Crosspin holes on receiver too much forward.
-Crosspin holes too far from receiver centre. Distance centre to centre on the Remington is .520’.(resuming those measurements are identical on clones?) This would result in smaller than normal sear engagement.
-Sear point on the FP too much backwards. Most possible cause. Either change of sear piece or have metal added on sear point to achieve the normal FP travel.
R.G.C
Robert, thanks for the suggestions. Now, I'm curious to see how Defiance addresses/investigates the issue. The idea of getting a custom action is to have something superior to factory. The reality sometimes is you end up spending a lot of time getting 3rd party components to work together properly. Hopefully, this is an easy fix because I really like the actions Defiance makes.
Clones are not Remingtons. Every action has its own individual precise measurements. When you order a custom clone you need to tell the manufacture what trigger you are going to use. Cocking pieces and sears need to fit properly. If not you are looking for a failure in the making.
Nat Lambeth
Nat Lambeth
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