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#6966765 - 11/20/17 12:01 PM Tikka light primer strikes
patriot07 Online   content
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Registered: 11/06/11
Posts: 2068
Loc: Royse City, TX
Anyone had this issue?

My Tikka all of a sudden started having light primer strikes. Plenty of flawless rounds through it before now with good dents on the primers. I'll add pictures of the primers later (cases are at home), but it looks just like what you'd expect a light primer strike to look like.

My questions:

- What is the silver piece in the first picture? Looks like it is a stop for the firing pin.
- What else could cause the firing pin to stop short? On the last picture, you can see how far the pin goes when the bolt is out of the gun. When the bolt is in the gun, the pin sticks out past the shroud just a few thousandths. To me, this looks like just about the right amount to cause the kind of strikes I'm seeing. But I'm not sure what's causing it other than possibly the firing pin stop having moved?
- Third picture is just showing how far the pin sticks out when the bolt is out of the gun and the pin is released to fire.





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#6966790 - 11/20/17 12:16 PM Re: Tikka light primer strikes [Re: patriot07]
RiverRider Online   content
THF Trophy Hunter

Registered: 11/11/07
Posts: 7537
Loc: Wise Co.
The silver thingy is your sear. I'd suggest dismantling that bolt and checking for gunk inside the bolt body and the front edge of the firing pin.
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#6966794 - 11/20/17 12:18 PM Re: Tikka light primer strikes [Re: patriot07]
RiverRider Online   content
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Registered: 11/11/07
Posts: 7537
Loc: Wise Co.
And the spring too.
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#6966803 - 11/20/17 12:22 PM Re: Tikka light primer strikes [Re: RiverRider]
FiremanJG Online   content
THF Celebrity

Registered: 12/16/08
Posts: 22926
Loc: Wolfe City, TX
Originally Posted By: RiverRider
The silver thingy is your sear. I'd suggest dismantling that bolt and checking for gunk inside the bolt body and the front edge of the firing pin.


I did that yesterday on this very bolt. I told Brad I've seen more than one Rem 700 pins and springs covered in grease, which attracts dirt, and makes a nasty paste. This pin and spring were barely dirty, and still had a light coat of oil on them.

They are CCI 400 primers, also, so a good primer for sure.

The light primer struck primers looked to be flush with the case head, so they're not in too deep.

I was stumped with it yesterday, as well.
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#6966818 - 11/20/17 12:32 PM Re: Tikka light primer strikes [Re: patriot07]
kmon1 Online   content
junior

Registered: 09/27/06
Posts: 22474
Loc: Texas
Same ammo or different ammo. factory or reloads? Short ammo can cause light primer strikes.

CCI 400 are a good primer and not as thick a cup as some of the other choices.

Just sayin it might not be the gun
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#6966827 - 11/20/17 12:36 PM Re: Tikka light primer strikes [Re: patriot07]
kmon1 Online   content
junior

Registered: 09/27/06
Posts: 22474
Loc: Texas
thought a little more since it is CCI 400 primers I guess reloads. Still could be ammo on the sizing, doubtful but could be. Primers not seated fully can cause light strikes as the primer is seated by the firing pin but nor enough energy to seat the primer and dent it.
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#6966837 - 11/20/17 12:42 PM Re: Tikka light primer strikes [Re: patriot07]
patriot07 Online   content
Veteran Tracker

Registered: 11/06/11
Posts: 2068
Loc: Royse City, TX
Well if that's the sear, then it can't be what's stopping the pin from full forward motion.

I don't believe it's a headspace issue. I took some of my fireformed brass that had good dents in the primers and loaded new primers and it was a little tough to close the bolt and the primers fired but still had fairly weak impacts (but a little better than the FL-sized brass I was trying to shoot with, as expected). So it definitely seems like the headspace is the same, but something is keeping the pin from going all the way forward. My only concern is that I have about 400 rounds of ammo loaded up for this gun and if they start messing with headspace, I'm worried it might affect how the gun shoots those loads. FWIW, it did this with both my loads and Chad's loads and has shot fine with both until now.

Last night, I sprayed the bolt with brake clean and worked the spring and still no improvement. It was hard to see down inside the bolt in detail, but I didn't see anything that would cause the pin to hang up.

I called Beretta today and they said a 2-week turnaround time and they'd have it fixed up for me, but I was hoping to have it fixed on my end without them messing with it if possible because I don't want them to render my 400 rounds of ammo useless. But if that's what has to happen, then at least it sounds like it would be quick.

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#6966842 - 11/20/17 12:45 PM Re: Tikka light primer strikes [Re: kmon1]
patriot07 Online   content
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Registered: 11/06/11
Posts: 2068
Loc: Royse City, TX
Originally Posted By: kmon1
thought a little more since it is CCI 400 primers I guess reloads. Still could be ammo on the sizing, doubtful but could be. Primers not seated fully can cause light strikes as the primer is seated by the firing pin but nor enough energy to seat the primer and dent it.
It was reloads. Some of Chad's and some of mine. Both shot great in the gun until yesterday.

The one big win yesterday was getting my daughter out on the range with her new stock for the 10/22. I got the ATI folding/collapsible stock because all of the factory stocks are much too big, and this one really fits her well. She was loving it. Even with the Tikka issues, it made the day worthwhile to see the smile on her face and listen to her tell my wife how much fun she had.

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#6966845 - 11/20/17 12:49 PM Re: Tikka light primer strikes [Re: FiremanJG]
patriot07 Online   content
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Registered: 11/06/11
Posts: 2068
Loc: Royse City, TX
Originally Posted By: FiremanJG
Originally Posted By: RiverRider
The silver thingy is your sear. I'd suggest dismantling that bolt and checking for gunk inside the bolt body and the front edge of the firing pin.


I did that yesterday on this very bolt. I told Brad I've seen more than one Rem 700 pins and springs covered in grease, which attracts dirt, and makes a nasty paste. This pin and spring were barely dirty, and still had a light coat of oil on them.

They are CCI 400 primers, also, so a good primer for sure.

The light primer struck primers looked to be flush with the case head, so they're not in too deep.

I was stumped with it yesterday, as well.


Forgot to mention that Jason pulled it apart yesterday and we couldn't find any grease/gunk/etc. Nice to know how easy it was to pull the tikka bolt apart.

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#6966870 - 11/20/17 01:08 PM Re: Tikka light primer strikes [Re: patriot07]
603Country Online   content
THF Trophy Hunter

Registered: 07/03/12
Posts: 5819
Loc: Central Texas
Bad/weak spring?

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#6966898 - 11/20/17 01:28 PM Re: Tikka light primer strikes [Re: patriot07]
RiverRider Online   content
THF Trophy Hunter

Registered: 11/11/07
Posts: 7537
Loc: Wise Co.
I don't know anything about thw Tika trigger, but on some triggers an overtravel adjustment set too tight can cause the sear to fall sluggishly. If you've fiddled with an overtravel adjustment, it might be the cause.
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Originally Posted By: Ronald Reagan
It's not that liberals are not smart, it's just that so much of what they know isn't so.

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#6966909 - 11/20/17 01:34 PM Re: Tikka light primer strikes [Re: 603Country]
patriot07 Online   content
Veteran Tracker

Registered: 11/06/11
Posts: 2068
Loc: Royse City, TX
Originally Posted By: RiverRider
I don't know anything about thw Tika trigger, but on some triggers an overtravel adjustment set too tight can cause the sear to fall sluggishly. If you've fiddled with an overtravel adjustment, it might be the cause.
I don't believe Tikka has an overtravel adjustment. If they do, I haven't knowingly messed with mine.

Originally Posted By: 603Country
Bad/weak spring?
Certainly possible...unfortunately not fixable by me.

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#6966918 - 11/20/17 01:47 PM Re: Tikka light primer strikes [Re: patriot07]
RiverRider Online   content
THF Trophy Hunter

Registered: 11/11/07
Posts: 7537
Loc: Wise Co.
Could the firing pin be dragging on the rear guard screw?
_________________________


Originally Posted By: Ronald Reagan
It's not that liberals are not smart, it's just that so much of what they know isn't so.

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#6966996 - 11/20/17 02:28 PM Re: Tikka light primer strikes [Re: RiverRider]
patriot07 Online   content
Veteran Tracker

Registered: 11/06/11
Posts: 2068
Loc: Royse City, TX
Originally Posted By: RiverRider
Could the firing pin be dragging on the rear guard screw?
Good question - I'll check on that tonight.

Looked over the bolt yesterday assuming the problem was there, but I'm going to take the action apart tonight before I go to the trouble of sending it in.

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#6966997 - 11/20/17 02:29 PM Re: Tikka light primer strikes [Re: patriot07]
FiremanJG Online   content
THF Celebrity

Registered: 12/16/08
Posts: 22926
Loc: Wolfe City, TX
Brad, check to see if your rear action screw is dragging on the bolt. On that bolt, that square back part of the firing pin contacts the rear action screw. I have had to sand some off of those back screws before.
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