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SKS Delay When Trigger Pulled
#1
I built a bastardized SKS from a Yugo. It's all Tapco, 20 round mags, red dot, the whole works. Now I know most will say that any problems I have, I asked for, by modifying an SKS in the first place. Nothing I have done to this rifle would affect it in this way. I attached 2 pics for anyone who appreciates mods. Big Grin

I took it out yesterday and put 60 rounds down range. It was shooting great, except for 2 rounds. I was shooting TulAmmo so I partially suspect the ammo to be the culprit, but maybe not.

I experienced a delay between trigger pull and ignition on 2 of the rounds. I squeezed the trigger, heard the "clink" and then the round went off. It was ALMOST instant, but not instant enough. You could definitely feel the difference between these 2 delayed rounds over the normal fire.

Ammo? Trigger group? Huh

Any thoughts or input would be greatly appreciated.


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#2
Any light strikes? My guess is slow burning primers. If you see light strikes check that the hammer moves back and forth without any resistance. Make sure you don't have any burrs or metal shavings between the hammer and the inner wall of the trigger group. Of course cosmoline, clean it up real good if you haven't already.
[Image: picsay-1358258813.jpg]
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#3
Mr_Gixxer;122992 Wrote:Any light strikes? My guess is slow burning primers. If you see light strikes check that the hammer moves back and forth without any resistance. Make sure you don't have any burrs or metal shavings between the hammer and the inner wall of the trigger group. Of course cosmoline, clean it up real good if you haven't already.

I didn't notice any light strikes on any of the ones I picked up. The cosmo was scrubbed off in a parts washer a few months ago and minimal oil was applied. No metal shavings either. I have a feeling you may be right about the primers. I could hear the hammer hit the pin (as far as I know, that's what I'm hearing), but then it hesitated.
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#4
I don't know anything about SKSs, but that sounds like classic hang fire (slow ignition) to me. Switching to a different brand (or at minimum a different batch, but brand would be better) should help you sort it out.
I am not a lawyer.
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#5
twency;123014 Wrote:I don't know anything about SKSs, but that sounds like classic hang fire (slow ignition) to me. Switching to a different brand (or at minimum a different batch, but brand would be better) should help you sort it out.

I had 3 mags full. The first 2 were from the same batch, the 3rd was from another. Both hang ups happened in the same mag, the 3rd one.
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#6
pinhead1979;123020 Wrote:
twency;123014 Wrote:I don't know anything about SKSs, but that sounds like classic hang fire (slow ignition) to me. Switching to a different brand (or at minimum a different batch, but brand would be better) should help you sort it out.

I had 3 mags full. The first 2 were from the same batch, the 3rd was from another. Both hang ups happened in the same mag, the 3rd one.
That strengthens the idea that it was a bad ammo batch.

If you have more rounds from the batch which fed the third mag I suggest contacting the manufacturer and asking for a replacement or refund, especially if you still have the box(es) with the batch code for those rounds on it.

(For that matter even if you have no more rounds, if you still have the boxes please notify the company of the faulty batch, helping to establish a QC pattern if there is one.)
I am not a lawyer.
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#7
twency;123022 Wrote:
pinhead1979;123020 Wrote:I had 3 mags full. The first 2 were from the same batch, the 3rd was from another. Both hang ups happened in the same mag, the 3rd one.
That strengthens the idea that it was a bad ammo batch.

If you have more rounds from the batch which fed the third mag I suggest contacting the manufacturer and asking for a replacement or refund, especially if you still have the box(es) with the batch code for those rounds on it.

(For that matter even if you have no more rounds, if you still have the boxes please notify the company of the faulty batch, helping to establish a QC pattern if there is one.)

I'm not even sure who to contact (in Russia) about that ammo. I know it's 5.17 a box for a reason, but it still sucks when something doesn't work as it's supposed to.
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#8
It's a hang fire, and almost certainly the ammo.
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#9
bac0nfat;123031 Wrote:It's a hang fire, and almost certainly the ammo.

Seems to be the general consensus. I spoke to Ben Murray at Murray's Gunsmithing (TX) a few minutes ago, on an unrelated issue (popped primers), and I brought this issue up as well. He didn't hesitate to blame the ammo either.
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#10
pinhead1979;123028 Wrote:
twency;123022 Wrote:That strengthens the idea that it was a bad ammo batch.

If you have more rounds from the batch which fed the third mag I suggest contacting the manufacturer and asking for a replacement or refund, especially if you still have the box(es) with the batch code for those rounds on it.

(For that matter even if you have no more rounds, if you still have the boxes please notify the company of the faulty batch, helping to establish a QC pattern if there is one.)

I'm not even sure who to contact (in Russia) about that ammo. I know it's 5.17 a box for a reason, but it still sucks when something doesn't work as it's supposed to.

Tulammo USA has a website with contact info http://tulammousa.com/contacts/
I am not a lawyer.
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