DUD Remington 7.5 small rifle bench rest primers

[EOD Rob]

This is very interesting. I am very curious to see what the issue ends up being! Could very well be a bad lot of primers.
Keep us posted on this one!

 

[Nic Swink]

Did you set your die up according to the instructions where it touches the shellholder?

Yes

 

[Nic Swink]

Thanks guys for all of your replies I gathered so much info it got my head spinning. I started by pulling the bullets dumping the powder 90% of them had moisture in the powder and sticking inside of the case. And I also measured the primer depth and it’s 0.005 on the virgin primers now when I was asked if I resized them no I didn’t, for some reason I was thinking resizing was meaning debur for the bullet. My die recommends with the shell holder Just touches the shell holder then turn 1 1/4 turn to seat the bullet. I also had orderd a hand primer tool so I can have better feel. I take take all the info I can get boys cause I’m new and very interested in it. Thanks again

 

[skeeljc]

The excessive head space created by bumping shoulders on virgin brass didn’t help. As stated, the primers haven’t gone off. As also stated, you could soak primers in water and they would still go off.

I have not seen the FL die that will bump new brass more than a couple of thousands. I will call BS on immersing primers in water and having them go off. They might go off if you dried them properly. Priming compound is wet when they put it in the cup so it is INERT during the manufacturing process.

 

[Tokay444]

I have not seen the FL die that will bump new brass more than a couple of thousands. I will call BS on immersing primers in water and having them go off. They might go off if you dried them properly. Priming compound is wet when they put it in the cup so it is INERT during the manufacturing process.

My Redding body dies will crush shoulders back .030” if you let them touch the shell holder. I had a Hornady full length bushing die that would do the same.
As for wet primers, you don’t have to take my word for it.

You cant kill primers soaked under water or oil for months

 

[Tokay444]

Thanks guys for all of your replies I gathered so much info it got my head spinning. I started by pulling the bullets dumping the powder 90% of them had moisture in the powder and sticking inside of the case. And I also measured the primer depth and it’s 0.005 on the virgin primers now when I was asked if I resized them no I didn’t, for some reason I was thinking resizing was meaning debur for the bullet. My die recommends with the shell holder Just touches the shell holder then turn 1 1/4 turn to seat the bullet. I also had orderd a hand primer tool so I can have better feel. I take take all the info I can get boys cause I’m new and very interested in it. Thanks again

So, did you bump the shoulders back on the virgin brass or not?

 

[LHSmith]

Please check the headspace by using tape on the headstamp as previously described and let us know.

 

[Mark W]

I have not seen the FL die that will bump new brass more than a couple of thousands. I will call BS on immersing primers in water and having them go off. They might go off if you dried them properly. Priming compound is wet when they put it in the cup so it is INERT during the manufacturing process.

Call it what you want, but I once tried to kill some with water and and they still off.

Just for fun I went down to the loading room and submerged 4 Remington 7 1/2s in water. I’ll pull them out sometime tomorrow and stick them in a 223 case and see if they will fire.

 

[Dusty Stevens]

I have not seen the FL die that will bump new brass more than a couple of thousands. I will call BS on immersing primers in water and having them go off. They might go off if you dried them properly. Priming compound is wet when they put it in the cup so it is INERT during the manufacturing process.

Its for static. They will still explode during the mfr process even under water as evidenced by the many explosions, blow away wall panels, limited compound in one spot, limited people around it at any time, etc. this is why there are not primer factories everywhere- it is so very extremely dangerous

 

[Dusty Stevens]

Yes

You bumped your shoulders way way too much.

 

[Nic Swink]

You bumped your shoulders way way too much.

There’s only 0.004 difference between the Virgin brass and the other

 

[dellet]

Nic, you’re in a tough spot. Lots of things being thrown about, lots of confusion in this thread. A couple thoughts. The quote below is a good example of both confusion and ignorance. Luckily both of those can be easily cured.

when I was asked if I resized them no I didn’t, for some reason I was thinking resizing was meaning debur for the bullet. My die recommends with the shell holder Just touches the shell holder then turn 1 1/4 turn to seat the bullet.

I am not aware of any bullet seating die that adjusts that way. As you thought resizing was removing a bur, I think you might be confusing setting up a seating die, with setting up a sizing die.

It’s important to figure out what’s going on, and get you some help. A good start would be knowing what dies you are using so you can get them them set up correctly.

Something I think was mentioned in the thread, and I may be wrong, was a simple way to check headspace with no tools other than what you have, but I will repeat it in case I am wrong,

Seat a primer, it can even be a used one to be absolutely safe, so about half the primer is sticking out. Insert the piece of brass in the chamber and gently close the bolt. Carefully remove that case and measure the amount the prime is sticking out. That will be your headspace clearance.

It would be helpful to do that with a piece of brass that fired, and one that did not for comparison. That would be very useful Information for those trying to help you. That number means much more than simply one is shorter than the other.

It might also be helpful for you, to pick one or two people who have been helpful, whose posts you have read and feel comfortable with and understand their way of explaining things and take this to PM’s. Too much well meaning help, can be very confusing.

Ignorance is simply a lack of knowledge, it doesn’t in any way imply a lack of thinking. In fact in your case, asking the questions and seeking answers is a sign of very clear thinking. Don’t let that clear thinking get cluttered up.

 

[Nic Swink]

So, did you bump the shoulders back on the virgin brass or not?

There’s only 0.004 difference between the Virgin brass and the other

 

[Mad_Charlie]

There’s only 0.004 difference between the Virgin brass and the other

Virgin cases are often "short". I have had new cases that were .011 shorter than the chamber AND primer pockets in those same cases that were visibly deeper than usual. Yes, I had some rounds that failed to fire, but the primers were barely touched.

Also, as has been mentioned, full length sizing dies can and will, if not adjusted correctly, set a shoulder back too much. In my case it was a Hornady New Dimension die in .223, that would set the shoulder back right at .030 below the top of a Wilson case gauge if set to bump the shell holder, which resulted in incipient case head separations when those rounds were fired. I guess that was what they meant by "New Dimension". That die made a satisfying splash. It was also the "stickinest" die I ever owned, regardless of lube used.

 

[gunsandgunsmithing]

This offers some good info on measuring shoulder bump.

How’s Your Headspace? Four Tools to Measure Shoulder Bump « Daily Bulletin

The Tactical Rifle Shooters Facebook Group recently showcased tools used to measure case headspace before and after bumping the shoulder. After a case is fired, hand-loaders who full-length size their cases will typically bump the shoulders back anywhere from .001 to .0035, depending on the...

bulletin.accurateshooter.com

 

[Tokay444]

There’s only 0.004 difference between the Virgin brass and the other

Is that a yes or a no? What is, “the other”? The fired brass?

 

[expiper]

what cal. and brand is the brass????....pull the bullets on the mis-fires and make shure there is powder in those ctgs!!!.....primers must be seated to touch the bottom of the primer pocket ,,if not the anvil will not crush the pellet and a mis-fire will occour,,,,,.Roger

 

[dkhunt14]

I have not seen the FL die that will bump new brass more than a couple of thousands. I will call BS on immersing primers in water and having them go off. They might go off if you dried them properly. Priming compound is wet when they put it in the cup so it is INERT during the manufacturing process.

I have seen dies bump up to .050. They can really vary. We took 10 brand new Dasher dies and measured them. There was almost none of them the same and they sized the cases different at some place on the case. Matt

 

[dkhunt14]

Its for static. They will still explode during the mfr process even under water as evidenced by the many explosions, blow away wall panels, limited compound in one spot, limited people around it at any time, etc. this is why there are not primer factories everywhere- it is so very extremely dangerous

And black powder manufacture is even worse. Matt

 

[expiper]

Here are some primers that were in a fire,,they were exposed to heat and water ,,none went off,,I was given them by the persone who was afraid of them,,,I put them in a frezer bag and stored in an outside location exposed to the weather/temp. extremes here in WV (zero to 100* F) ,,,20 years after the fire I decided to use them for fireform loads,,,every one functiond perfectly,,I had to pry many of them from the melted trays that they were encased in !!!!...Roger