No4T trigger advise please

[Merlin266]

Hi all, I have an issue with my trigger on my No4T and having read Peters trigger pull off threads I'm still unsure of a way forward. When I start to take up the 1st stage it feels graunchy, it's as if there 2 stages within the 1st stage ( pressure, trigger moves, then stops, a slight increase in pressure required to continue to 2nd stage). Then I get a positive stop to which the 2nd stage starts with a crisp release to the fired position. What I have noticed is, during the squeeze of the 1st stage I can see the cocking piece move rearward by about 14 thou, so not only is the sear nose moving down the cocking bent, it's pushing it back I reckon. I don't think this is normal but I could be wrong.

Information

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[Peter Laidler]

Second bit first. The cocking piece WILL be pushed back slightly as the sear is drawn down its face simply because the sear is ROTATING about its axis while it is being drawn. As such, the cocking piece WILL be pushed rearwards a tad. But .014" seems excessive although I have never measured it!.

As for the graunchiness, that's easy. There is only one cause and that is a poor finish of the bearing surfaces of the trigger, the sear and/or the cocking piece - and I suspect the latter. Or the trigger/sear axis pins. To properly correct a crap finish of the cocking piece nose it MUST be polished flat using a up-down stroke and not across. So it means removing the cocking piece from the striker I'm afraid. The real experts might tell you otherwise but in my limited experience............

[Merlin266]

Thanks Peter, I shall take it apart at the weekend and have a look at both the axis pins and the finish on the sear and cocking piece.

[Peter Laidler]

Don't forget that the angle you put on the face of the cocking piece alters the weight of the pull-offs. The EMER says 1st pull, 3 - 4 lbs. 2nd pull-off. Absolutely no drag whatsoever, clean and crisp at between 5 - 6.5lbs

[Merlin266]

Second pull and release is fine, I shall concentrate on checking the pins and the surface finish on the cocking piece. Once i get the 1st pull to be smooth, hopefully it should do the trick. If I balls it up I'll be back here begging.

[Peter Laidler]

While it's apart make sure that the lower trigger bent on the sear is flat/not ridged and polished ALONG and NOT across.

[Merlin266]

I pulled the rifle apart and polished all the contact points, I noticed on the cocking piece a small depression where the sear had made contact when cocking the weapon ( maybe heavy handed slamming the bolt forward could have caused this, who knows). Anyhow I maintained the angle and polished it out and it seems to have cured it. My trigger is constitantly smooth in operation now, thanks for the advice Peter. One thing I did notice was the lack off the spacer the sits under the forward trigger guard, I only have a lock washer beneath it.

[Brian Dick]

Where is the small depression on the cocking piece? On the face or underside?

[Peter Laidler]

I think it'll be on the face of the cocking piece Brian........

It is VERY important that you DO have the spacer under the front trigger guard screw. This ensures that......... Look...., it is important and reasonably easy to set up, file/machine to the exact length providing you follow the simple instructions wot I rit some time ago.

[Merlin266]

Hi Brian, the slight depression is / was on the face of the cocking piece. I shall try a get myself a spacer and follow wot you writ if can find it to rectify the issue .

Thanks