loose primers

C

Chet

Guest
I just completed my 6.5x284, I have Lapua brass shooting just under 49grs H4350 & 140 bullet and I am noticing my primers are starting to press in the case easier than new brass after about 5-6 firings, is this common, coming from a 6BR I don't recall a loose primer pocket in 2 yrs.


Chet
 
What you are expeiencing is the result of high pressure loads and there is no cost effective fix other than replace the cases. First though, you might try some Russian primers as I hear they are slightly larger.

George
 
are they truly loose or just fitting easier? A country boy test I make is to seat a primer and then holding the case at about a 45degree angle tap it two or three times kinda sharply (that's a very scientific term) on a wooden table top. If the primer doesn't start to back out, I say it's good to go.
 
beemanbeme said:
are they truly loose or just fitting easier? A country boy test I make is to seat a primer and then holding the case at about a 45degree angle tap it two or three times kinda sharply (that's a very scientific term) on a wooden table top. If the primer doesn't start to back out, I say it's good to go.
Click to expand...


I am not near that stage.... I don't think I will get to that stage for at least another possibly 6 firings. maybe more

Chet
 
If there not flatening out a lot from the same load, your ok. But if you notice the primers flatening a bunch more than they did, then it's time to replace or do something I don't really recommend but if you have a lathe and good at using it, you can chuck up the case and put a very, very slight taper on the case heads. Start where you don't take any off where the primer hole is and move to the outside of the rim. This don't take much taper and shouldn't remove all the lettering. During firing this will cause the case head to flow metal into the primer pockets while it's trying to flatten the head back out. Found out this with some ppc brass a few years ago that was tappered and couldn't figure out why the primer pockets were getting tighter even with HOT loads. I had to keep reaming the pockets until the case heads flattened. And when I say very little needs to be taken off...I mean very little. I talked to a few gunsmiths about this and they said it was perfectly safe but I say again...very little and it must be consistant from case to case or the internal volume will change between cases.

Hovis
 
beemanbeme said:
are they truly loose or just fitting easier? A country boy test I make is to seat a primer and then holding the case at about a 45degree angle tap it two or three times kinda sharply (that's a very scientific term) on a wooden table top. If the primer doesn't start to back out, I say it's good to go.
Click to expand...

Hey cuz,
You need to get a really good pair of safety glass's, or maybe a full face shield,,,,,,,,,,,,,,,,,,,,,,

the wind is my friend,,,,,,,,

DD
 
To be a devil's advocate, Why do I need safety glasses? An empty case with a primer in it?? even if the primer went off, what would, could it hurt? I'm sure it would jolt your senses but I can't imagine how it would happen. Nor what real harm it could cause. I've had a couple that would start to back out, that is to say, they could come out enough to be above the head of the case but never come out and fall on the bench top. But if they did, what could happen. You do understand that to ignite a primer has to have a sharp blow from a pointed object don't you.
 
Chet said:
I just completed my 6.5x284, I have Lapua brass shooting just under 49grs H4350 & 140 bullet and I am noticing my primers are starting to press in the case easier than new brass after about 5-6 firings, is this common, coming from a 6BR I don't recall a loose primer pocket in 2 yrs.


Chet
Click to expand...

Chet, to answer your question..... your load is too hot In My Opinion.

I'm not gonna' try to be nice nor excuse your behavior and attempt to make it OK. You're playing with fire, literally.

YOUR LOAD IS TOO HOT

"Normal" cases will not take pressure like you're now used to. Welcome to the world of overbore reloading using huge wimpy cases. :)

IMO the recommendation to stay there until the primers will move from tapping pressure is dangerous and the idea that you can cup the caseheads to avoid it is flawed......you're right on the ragged edge with your load and the slightest bobble will push it over.

Primers are not a reliable indicator, (again IMO) casehead expansion is.

Just measure the caseheads before and after to SEE the expansion.

You can't stop it.

You can't fix it.

Except by backing down the load.

GOTTA' be blunt on this one, it's your eyeballs you're risking.

opinionsby

al
 
I can try a few tents down and see what happens, the bolt lift is fine, velocity is normal and the accuracy in exceptional, so I will drop back and hope I don't lose my accuracy.

Chet
 
beemanbeme said:
To be a devil's advocate, Why do I need safety glasses? An empty case with a primer in it?? even if the primer went off, what would, could it hurt? I'm sure it would jolt your senses but I can't imagine how it would happen. Nor what real harm it could cause. I've had a couple that would start to back out, that is to say, they could come out enough to be above the head of the case but never come out and fall on the bench top. But if they did, what could happen. You do understand that to ignite a primer has to have a sharp blow from a pointed object don't you.
Click to expand...

some people just don't need to reload,,,,,,,,,,,,,,,,,,,,,,,

the wind is my friend,,,,,,,,,,,,,,

DD
 
Whar brand primer are you using? Years ago I had some Remingtom primers that about 20% were so loose they would almost fall out. Federal and CCI were tight.
 
David Dumas, other than your smart remark, you didn't explain how tapping a empty, primed rifle case on a wooden table would be dangerous. Exactly what value have you added to this thread?
I didn't research his load. That would be foolish. Trying to tell him what loads were safe in his rifles. But he merely stated that his primers were seating "different". And I offered one possible reason. I've reloaded long enough and shot enough that I have indeed had cases that, with prefectly safe load, just get tired and without primer flattening nor smut around the primer, they just did not feel right when I seated a primer. They would let a primer slip back when tapped on a table and I retired them to the scrap bucket.
 
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