Thread: Primer failure rate.

I've been primarily reloading with Fiocchi lr 6 i seem to regularly have dud primers. Sometimes, firing it twice will make it work, but often not. I think it would be about 4% failure rate, maybe more.

Two questions,
Is there something I'm doing that's causing this? Primer seating dept? Ect...

Are other brands more reliable?

Cheers

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Originally Posted by Rn-85

I've been primarily reloading with Fiocchi lr 6 i seem to regularly have dud primers. Sometimes, firing it twice will make it work, but often not. I think it would be about 4% failure rate, maybe more.

Two questions,
Is there something I'm doing that's causing this? Primer seating dept? Ect...

Are other brands more reliable?

Cheers

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What rifle are you using them in post some pictures of loaded rounds.
I've loaded around 1000 of them and no issues.

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Oversizing brass can do it but I have 1-2 failures per 200 using Ginex primers and I can find no reason

I shot 40 rounds today with Fiocchi primers. 1 failure. Was it a coincidence that when loading the particular batch of 10 the misfire fell within, I held 4 of the primers in my hand briefly?

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Photos for reference. Odd failure. I try not to touch them, i clean the primer pocket, ect. Do they have a life span?

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Originally Posted by Rn-85

Photos for reference. Odd failure. I try not to touch them, i clean the primer pocket, ect. Do they have a life span?

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Thats a good strike on the primer, I use cci 450's for my 223 and federal large magnum primers for my 7mm rem mag with no issues so far. All of them have gone bang!

I re fired it 3 times, it.should be a good strike. Can i dismantle the round with a kinetic hammer?

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I think that the "dont touch primers"talk is absolute crap. And is probably an old wives tale situation. People have tried to deliberately make them inert by pouring fluids on them to no avail.
Maybe we have better sealants on the foil of the primer these days, who knows.
There is a list to go through in regard to Fail To Fire.

Firing pin strike too light.... caused by grease in the bolt, rust in the bolt. firing pin bent and dragging, Spring worn or too soft.

Primer not fully seated, so when the firing strikes it, not only does it dent the cup slightly and causes the anvil to press lightly onto the priming compound but it also drives it forward into the flash hole... this will most likely never go bang, unless you put it in a vice and hit it with a hammer ( dont)

Cartridge case has been oversized, so when the striker hits the primer cup it pushes the entire case forward into the chamber, soaking up all the energy.

Primer pocket full of carbon this means you cant seat the primer fully.

So take your pick you could have one two or three different causes. Primers should be below the surface of the primer hole by up to 5 thou. If you look at a live primer you can see that the anvil sits high and proud of the cup, when properly seated the anvil is set to be flush with the edge of the cup.
Some people use a certain amount of "crush" when seating their primers.
Another area of complaint usually arises when someone that normally uses standard primers swaps over to magnum primers. This has drama with inproper seating as a more sensitive standard primer might have been going bang when technically it was improperly seated, but along comes Mr magnum with his thicker cup and now all that hapens is it gets driven forward as in the above explanations.

Yes you can.

What's the rifle

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I had a 223 round that failed to fire on Friday. I got a couple of flat rocks and got my son to stand on them with the bullet held between them as I wriggled the case off. Wasn't keen on carrying it around with the primer strike in it.

I've never had a primer fail. Winchester, federal or cci.
Not saying it can't or wouldn't happen though, but primers are probably the last place to look for the problem.
Not in order but look into headspacing, primer contamination, firing pin spring and probably a multitude of things im not qualified to list.
Easy test is to give a mate some to load and see if they go bang

Originally Posted by johnd

I think that the "dont touch primers"talk is absolute crap. And is probably an old wives tale situation. People have tried to deliberately make them inert by pouring fluids on them to no avail.
Maybe we have better sealants on the foil of the primer these days, who knows.
There is a list to go through in regard to Fail To Fire.

Firing pin strike too light.... caused by grease in the bolt, rust in the bolt. firing pin bent and dragging, Spring worn or too soft.

Primer not fully seated, so when the firing strikes it, not only does it dent the cup slightly and causes the anvil to press lightly onto the priming compound but it also drives it forward into the flash hole... this will most likely never go bang, unless you put it in a vice and hit it with a hammer ( dont)

Cartridge case has been oversized, so when the striker hits the primer cup it pushes the entire case forward into the chamber, soaking up all the energy.

Primer pocket full of carbon this means you cant seat the primer fully.

So take your pick you could have one two or three different causes. Primers should be below the surface of the primer hole by up to 5 thou. If you look at a live primer you can see that the anvil sits high and proud of the cup, when properly seated the anvil is set to be flush with the edge of the cup.
Some people use a certain amount of "crush" when seating their primers.
Another area of complaint usually arises when someone that normally uses standard primers swaps over to magnum primers. This has drama with inproper seating as a more sensitive standard primer might have been going bang when technically it was improperly seated, but along comes Mr magnum with his thicker cup and now all that hapens is it gets driven forward as in the above explanations.

This is good info.
Might I add, a screw interfering some how with the fireing pin. (Too long, Happened to me)

Originally Posted by 25/08 IMP

What's the rifle

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Mauser M18 308

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Fed or WRE. NO failures. Use the KnM 3in1 primer pocket uniformer. Do you put expensive furniture into a rundown whare. Think about it.