Remington 7 1/2 small bench rest primers,... ok?

[Lefty Trigger]

I have been loading my 6br Norma loads using CCI 450 small rifle magnum primers and just opened a new box and got 4 misfires out of the first 25 rounds loaded. I have some Remington 7 1/2 primers but don't see many people using them, are they not as good? Locally all I can get is the CCI 450 magnums or the Remington's.

 

[xswanted]

They’ll work fine.

My first Dasher Barrel I loaded 7 1/2s all through the life of it. Shot great.

 

[Straightshooter1]

Since CCI primers tend to be a little on the hard side, do you think it might be that your firing pin might be striking a little light?

 

[dkhunt14]

CCI 450 and BR primers have thicker cups. Usually if they fail to fire it is one of three things. Not seated to bottom of pocket, too much bump on reloaded round or firing pin spring weak. Matt

 

[Lefty Trigger]

I'm going to have to stick with defective primers. They were hit hard and on a couple I tried a few times to set them off.
I was looking at the rest of the tray (75) and found two more that look odd like something is missing or out of place and checked two more trays but found no more? Maybe just a fluke with that batch. No worries though as the Remington primers are actually easier to get and I found that those are the primer of choice for Sierra's load data for the 6br Norma.

 

[dkhunt14]

I'm going to have to stick with defective primers. They were hit hard and on a couple I tried a few times to set them off.
I was looking at the rest of the tray (75) and found two more that look odd like something is missing or out of place and checked two more trays but found no more? Maybe just a fluke with that batch. No worries though as the Remington primers are actually easier to get and I found that those are the primer of choice for Sierra's load data for the 6br Norma.

When they don't go off, they look like they are hit hard. It lets a round deep dent in them. The pressure from firing makes them look different. Matt

 

[duanepa]

When they don't go off, they look like they are hit hard. It lets a round deep dent in them. The pressure from firing makes them look different. Matt

Bingo!

 

[243Lapua]

I have been loading my 6br Norma loads using CCI 450 small rifle magnum primers and just opened a new box and got 4 misfires out of the first 25 rounds loaded. I have some Remington 7 1/2 primers but don't see many people using them, are they not as good? Locally all I can get is the CCI 450 magnums or the Remington's.

I'm having the same issue with CCI in my 6.5x47. It is not light strikes or seating issues. Every packet of 100 primers I usually get about 6-10 misfire s. I compared a non fired to a misfired primer under a microscope and there is definitely ignition or burned primer component inside the misfired primers. I will send you my lot number so maybe we got the same lot. I bought mine from Powder Valley. I have tried Rem 7 1/2 and Fed Match with excellent results thou. Just need to tweek the load.

 

[Lefty Trigger]

I'm having the same issue with CCI in my 6.5x47. It is not light strikes or seating issues. Every packet of 100 primers I usually get about 6-10 misfire s. I compared a non fired to a misfired primer under a microscope and there is definitely ignition or burned primer component inside the misfired primers. I will send you my lot number so maybe we got the same lot. I bought mine from Powder Valley. I have tried Rem 7 1/2 and Fed Match with excellent results thou. Just need to tweek the load.

Good I will check that against mine. I never thought to look at the ones I popped out, I just looked at the rest of the new ones. I would think if it ignited at all it would kick off the powder,... maybe not?

 

[hammerjack]

You can take the ones that did not fire and do the hammer on concrete test on them.
Have never found one that would not go off yet. Use safety glasses; most times it's a little too much head space.
450 are tuff.

 

[carlsbad]

I'm shooting 7.5s.

 

[WyleWD]

CCI 450 and BR primers have thicker cups. Usually if they fail to fire it is one of three things. Not seated to bottom of pocket, too much bump on reloaded round or firing pin spring weak. Matt

If you call CCI they will tell you that their primers need to be set .005-.008 below flush with the case head with a slight crush to set the feet of the primer in the bottom of the primer pocket. Aside from that I agree with Matt. Usually it is a weak pin spring, not enough fall on the pin, something inside the bolt keeping or impeding pin drop, or excessive head space.

And please don't do the hammer thing, it's dangerous and has nothing to do with how primers are tested. JME. WD

 

[C.E.Smith043]

Simple test is to knock the primer out and take it outside on cement a smack it with a hammer. If it goes off u have other problems. Wear safety goggles.

 

[Bkluke]

Never had an issue with 450’s in a Dasher or a 6.5x47

 

[hammerjack]

If you don't want smack them with a hammer install them in a case on a different gun that doesn't have this problem .

 

[Evan]

How old is your firing pin spring? They do wear out and it's pretty cheap to try. If doesn't fix it, you've got a spare spring for when you need it.

 

[Lefty Trigger]

The action I used to build the rifle is not even 8 months old yet and it ran fine as a .308. I shot about 25 rounds on sunday using the Rem 7 1/2's and they seem to be fine. I actually hope they work well as they are easier to get ahold of than the CCI's.

 

[Evan]

The action I used to build the rifle is not even 8 months old yet and it ran fine as a .308. I shot about 25 rounds on sunday using the Rem 7 1/2's and they seem to be fine. I actually hope they work well as they are easier to get ahold of than the CCI's.

Yeah, absolutely nothing wrong with Remington primers. If the gun likes them, that's all that matters.

 

[JFrank]

The only primer I would avoid is the Rem 6 1/2
I believe you could built a load around most any primer

 

[Down South]

SPJ, what distance was this test shot at?