Differences In Primer Fit Ginex vs Federal

[man7sell]

In the last couple of days I have received two lots of small pistol primers ordered online over the last month. I had and interesting and a little disturbing observation.
Used 38 spl range brasses various brands.
I loaded 50 rounds of 38 spl. using the Federal gold Medal Magnum match primers (I know pricey at around $125 a brick). I had zero problems seating and of these primers.
Next I received the Ginex primers at around $100 a brick. I found these primers hard to seat flush (yes all primer seats in the shells were cleaned out. Out of 50, maybe 20 where borderline acceptable flush with the shell base. 4 are sitting very proud (And no, I wont seat them further with a hammer).
Anyone had similar experiences?

Read More

 

[man7sell]

So I wondered about dimensions between the two primers. I thought maybe the Ginex were deeper than the Federal. The Federal ran very consistent .119" The Ginex were shorter running around .116" although not consistent (Measured only a 3 piece sample so maybe measure a lot more).

 

[po18guy]

What is your priming tool?

 

[Benchrest]

A bit apples to oranges, but when I was testing 10mm loads I ran into a challenge fully seating the Unis primers - after a bit of measuring I assumed they simply had harder cups.

Large pistol primer measurements

 

[arakboss]

In the last couple of days I have received two lots of small pistol primers ordered online over the last month. I had and interesting and a little disturbing observation.
Used 38 spl range brasses various brands.
I loaded 50 rounds of 38 spl. using the Federal gold Medal Magnum match primers (I know pricey at around $125 a brick). I had zero problems seating and of these primers.
Next I received the Ginex primers at around $100 a brick. I found these primers hard to seat flush (yes all primer seats in the shells were cleaned out. Out of 50, maybe 20 where borderline acceptable flush with the shell base. 4 are sitting very proud (And no, I wont seat them further with a hammer).
Anyone had similar experiences?

View attachment 1206394 View attachment 1206395

What did you use to seat the primers?

 

[man7sell]

What is your priming tool?

Lee turret press

 

[man7sell]

OK More accurate measuring tool, the Ginex is larger. Measured 10 each as a sample.

 

[po18guy]

Less than 0.0005" should not make that much difference. I have never used a press for priming, as that is not its main strength, so to speak. I believe that you will have much better results with a hand primer, or if seeking absolute uniformity, a bench primer.

 

[man7sell]

Less than 0.005" should not make that much difference. I have never used a press for priming, as that is not its main strength, so to speak. I believe that you will have much better results with a hand primer, or if seeking absolute uniformity, a bench primer.

Yes, I just ordered an RCBS hand primer, kinda defeats the purpose of a multi stag press just for these Ginex primers. Should have just sold them and bought some more expensive ones that will work with my tooling

 

[po18guy]

I edited my measurement. It is one half of one thousandth. (0.0005). Presses are made to press. They exert considerable force - enough to crush primers. Some presses work well for this - but it is overkill, as the primers need less than 1% of the force to seat as compared with sizing a case. Bench primers have far less leverage and you will be pleased to feel a primer as it seats in the bottom of the pocket.

If some pockets are tight, you can use a primer pocket swager or a primer pocket uniformer - both of which are intended to make the primer pockets into uniform size. The swaged removes and military-style crimp and the uniformer enlarges undersized pockets ever so slightly. In truth, the press is not at fault, and neither are primers. It is the cases themselves which have a surprising amount of variation, being made in the billions, using all manner of new and old tooling, different mixtures of cartridge brass, different manufacturing processes, and in many different nations. Actually, it is rather amazing that they are as uniform as they are.

But, as to primers, in times of shortage, it is any primer in a storm. Learn 'em, load 'em, shoot 'em.

 

[DizzyJ]

Primers can definitely make a difference in force required to seat. I had some S&B primers that were noticeably harder to seat one time. A few tenths can make a difference when talking about a press fit.

Oddly enough, they were also the primers that gave me some of the lowest SDs and ES.

I sometimes save those primers for pockets that may be getting a little bit loose.

 

[Certaindeaf]

There's something wrong with your biceps. A primer can only not be seated deep enough if it's flattened to hell and still sticks out.

 

[DizzyJ]

There's something wrong with your biceps. A primer can only not be seated deep enough if it's flattened to hell and still sticks out.

You challenging the OP to an arm wrestling match?

 

[man7sell]

And who is this comment aimed at?
And if this won't seat them but will seat CCI, Remington, Winchester.... but not Ginex

 

[man7sell]

Anyway my solution... Buy USA made primers. I will pay the raising cost. Who wants 4000 Ginex primers???

 

[gmerkt]

These kinds of challenges using different components happen. I used to have problems with high primers on some .30 US Carbine brass. Get the uniformer tool if you are going to stick with primers that tend to seat high.

 

[Snip]

Do you have a go/no gauge for your primer pockets? Something like this: Tool

 

[DizzyJ]

Anyway my solution... Buy USA made primers. I will pay the raising cost. Who wants 4000 Ginex primers???

I'll take 'em for the right price

 

[PiratePast40]

I also had problems seating them in some brass. Most was no different than others but had problems with Norma brass. This was with 9mm range pickup brass.

 

[man7sell]

Do you have a go/no gauge for your primer pockets? Something like this: Tool

I don't have one of those tool. I do use the Lyman case prep tool on all my reloads.