I have this primer energy chart (attached)

[Rule3]

I have a copy of this primer energy chart and I can not recall where it came from?? I am thinking a old Speer manual but it's not in Speer #8. Does anyone know where it came from??
I find it interesting that based on this a SRP is not much different in energy than a SPP.
A SPM has a lot more energy.

CTR + to make it larger

 

[243winxb]

Primers

CCI primers -Mysteries And Misconceptions Of The All-Important Primer http://www.shootingtimes.com/2011/01/04/ammunition_st_mamotaip_200909/ Just seated some CCI mag primer in 38 spec.. They always seem to seat harder than other brands. Good if the pocket is on the large side.

 

[GLOOB]

I find it interesting that based on this a SRP is not much different in energy than a SPP.

The energy/brissance is only one part of the equation. The other difference is how much pressure the cup is designed to handle. So even if the priming compound was exactly the same, you should still use the correct primer, all else equal.

 

[JSmith]

Just seated some CCI mag primer in 38 spec.. They always seem to seat harder than other brands.

I experienced that with Remington #1-1/2 SPP in .38 spl last week. Really had to push hard on them to get them seated.

 

[Rule3]

The energy/brissance is only one part of the equation. The other difference is how much pressure the cup is designed to handle. So even if the priming compound was exactly the same, you should still use the correct primer, all else equal.

Yes, I am aware of that, In loading the 327 Federal Mag Speer, initially was using the Small Rifle primer for the reason you stated. Other Reloading manuals and powder companies tested with Small pistol magnum and regular small pistol.

I bought a lot of Wolf Primers when they were cheap and they are harder (IMO) than CCI.


But, does anyone know where this chart came from??
Speer #12??

 

[243winxb]

Speer #7 online LInk

CAUTION: The Speer #7 includes loading data beyond currently published maximums for cartridges. USE AT YOUR OWN RISK. Neither the writer, The High Road, nor the staff of THR assume any liability for any damage or injury resulting from use of this information.
From 1966- Speer #7 is available online here > http://www.cheaperthandirt.com/Library/BookPage.aspx?bid=FW0005274&sid=894&pid=8 Chart on page 66 Many more online books > http://www.cheaperthandirt.com/Library/

 

[Rule3]

CAUTION: The Speer #7 includes loading data beyond currently published maximums for cartridges. USE AT YOUR OWN RISK. Neither the writer, The High Road, nor the staff of THR assume any liability for any damage or injury resulting from use of this information.
From 1966- Speer #7 is available online here > http://www.cheaperthandirt.com/Library/BookPage.aspx?bid=FW0005274&sid=894&pid=8 Chart on page 66 Many more online books > http://www.cheaperthandirt.com/Library/

Thank you very much, I was one Volume off Nice disclaimers Speer #8(which I have) was always considered the "Nuclear" manual, #7 must be even "better"

Of course the energy values are probably not valid today as I am sure the compounds have been changed.

 

[gamestalker]

Thanks, really cool chart.

GS

 

[PO2Hammer]

Thanks for the chart.
No wonder why you see so many heavy .357 magnum loads specifying the CCI 550.
Would love to see some direct side by side evidence with CCI, Winchester and Federal.

 

[Rule3]

I tried researching SAAMI for specs, as I would think they have standards for primers but I did not find any.Other than dimensions. JMO but I do not think there is much difference in flash or ignition between brands, I would think they are all competitive but I have no absolute test or data on them. As the article that 243win linked to, I imagine they change a lot over the years.

What started this whole thing on another forum (and maybe here) was due to the primer shortages,(desperate times call for desperate measures) the use of SR in place of SP. The general replies were that they can be used if the handgun will ignite the harder rifle primer, They are the same size and based on the chart not much different. Always good to reduce the charge to minimum and work back up.