Magnum primer's in a LR case

I've used magnum primers in cases as small as 222 Rem. Just drop the charge weight 2 or 3 grains from your information source and work your load up just like you would any other.
 
Magnum primers are all that I use. Both of my 30-06's run on a steady diet of 57.5grs H4350, CCI250 magnum primers, and 180gr Hornady Interlocks. For any 223 that I've ever owned, they have survived on about 95% CCi450 magnum caps. I played with a load for the 223 that used basically a case full of WIN760; this probably wouldn't have ignited with anything other than a magnum cap.
Mike
 
So long a you work up the load with the magnum primers, not just switching the primers with the same load, there shouldn't be any problem. Like the others, I only use magnum primers.
 
A way, way, too much emphazise is placed on the difference between magnum and standard primers.
If there is any difference in the results of burning between the two, I have not yet discovered it, and I have been reloading for more than a few years.
I have never used any change in powder charge, regardless of what primer I have used, and I have never detected any change in pressure signs.
Something like thirty years ago I read about a major lab test, where they checked every primer available. They used a device whereby they could alter the pressure of the striking force of the firing pin that hit the primer.
The end result, published in reloading publication, was that the strength of the pin hitting the primer, had more to do with the burning, or fire power of the primer, than did the type of primer being tested.
A standard primer hit with a hard hit, gave more strength, than did a magnum, with a weak firing pin.
 
I'm glad this came up actually, as I bought a 300 WSM rifle and was wondering whether or not to use regular LR primers or the magnum ones.
Does anyone know whether the loads on the Hodgedon website are intended for magnum or regular long rifle primers, by chance?
 
proonur said:
I'm glad this came up actually, as I bought a 300 WSM rifle and was wondering whether or not to use regular LR primers or the magnum ones.
Does anyone know whether the loads on the Hodgedon website are intended for magnum or regular long rifle primers, by chance?
Click to expand...

You have sort of answered your own question.
Just look at the Hodgdon's on the web loading data. There is no provision for primers!
If there were anywhere near the danger in changing between magnum and standard primers, as many on these threads seem to think, don't you think Hodgdons would clearly state what type of primer you were supposed to use?
 
My experience exactly parallels that of H4831. When I started loading for belted magnum cartridges I used 'ordinary' primers, and later switched to Federal 215. Nothing seemed to change....same velocity, same point of impact, same accuracy. So I started using them for everything from 25-06 to 45-70, and have never had a problem.
 
H4831 said:
A way, way, too much emphazise is placed on the difference between magnum and standard primers.
If there is any difference in the results of burning between the two, I have not yet discovered it, and I have been reloading for more than a few years.
I have never used any change in powder charge, regardless of what primer I have used, and I have never detected any change in pressure signs.
Something like thirty years ago I read about a major lab test, where they checked every primer available. They used a device whereby they could alter the pressure of the striking force of the firing pin that hit the primer.
The end result, published in reloading publication, was that the strength of the pin hitting the primer, had more to do with the burning, or fire power of the primer, than did the type of primer being tested.
A standard primer hit with a hard hit, gave more strength, than did a magnum, with a weak firing pin.
Click to expand...

^^^^^^^^^^^^^^^^^^
Listen to him. He's been reloading since before I was born. Just had my mid-life physical :D LOL No offence Bruce ROFL!!!! :D :D :D
 
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H4831 said:
A way, way, too much emphazise is placed on the difference between magnum and standard primers.
If there is any difference in the results of burning between the two, I have not yet discovered it, and I have been reloading for more than a few years.
I have never used any change in powder charge, regardless of what primer I have used, and I have never detected any change in pressure signs.
Something like thirty years ago I read about a major lab test, where they checked every primer available. They used a device whereby they could alter the pressure of the striking force of the firing pin that hit the primer.
The end result, published in reloading publication, was that the strength of the pin hitting the primer, had more to do with the burning, or fire power of the primer, than did the type of primer being tested.
A standard primer hit with a hard hit, gave more strength, than did a magnum, with a weak firing pin.
Click to expand...

Well.......My own experience goes totally contrary to that. Firing pin strike is important, yes, as is the right primer, powder, etc. so believe what you want, but I'll go with my own experience (about 25 years), and about every OTHER study that's out there.
Mike
 
I have been loading since 1966, and have a few friends loading almost as long. Never seen a problem in using magnum primers in large rifle cases, regardless of caliber.

In fact, my experience has been that mag primers give much more consistent loads in cold weather than regular primers.

Ted
 
I don't push loads to the max out of my 45-70, I usually keep it at 25-35000 psi according to quick load but I can't notice any change between the two primers.

I originally bought 1k of them for my low level unique and cast loads. I read that they were good at lighting a 1/3 case of powder more consistently but so far they all seem to work well and now I just use them for all of my loads.

I'll reconsider after the I shoot this thousand.. only 600 more to go :)

Ryan
 
My girlfriend is off on a work trip.. so I just sized, length trimmed and primed 200 45-70 with magnum primers...

I'm waiting for my MT Chamber bullets to show up. I ordered 500 this time as they run out too quickly.
 
Quote:---- "Well.......My own experience goes totally contrary to that. Firing pin strike is important, yes, as is the right primer, powder, etc. so believe what you want, but I'll go with my own experience (about 25 years), and about every OTHER study that's out there.
Mike"

How do you account for the fact that when you look up loads on the Hodgdon site on the computer, there is no mention of whether to use a standard, or a magnum primer?
It would appear that Hodgdon couldn't care less, whether you use a magnum, or a standard primer.
So why all this talk about having to start over and work up a load, if you change to a magnum primer?
 
H4831 said:
Quote:---- "Well.......My own experience goes totally contrary to that. Firing pin strike is important, yes, as is the right primer, powder, etc. so believe what you want, but I'll go with my own experience (about 25 years), and about every OTHER study that's out there.
Mike"

How do you account for the fact that when you look up loads on the Hodgdon site on the computer, there is no mention of whether to use a standard, or a magnum primer?
It would appear that Hodgdon couldn't care less, whether you use a magnum, or a standard primer.
So why all this talk about having to start over and work up a load, if you change to a magnum primer?
Click to expand...

Hodgdon's loads are low enough where primers, or cases (even though they mention them), or (even though they mention them) bullets are not an issue. They don't have anything loaded right to max pressure, and if you called Hodgdon up, I would suspect that they would tell you that they used the hottest primer that they could find during the test as to ensure that the reloader didn't run into any surprises.

Hold on a second, I'm wrong!

By the way.................Just to confirm what I'm saying, I looked in my 2006 copy of the annual reloading manual, and they DO LIST primers, and they are very specific as to weather they are using a magnum versus non-magnum primer!!!!!!!!!!!!!
Mike
 
I'll answer with some Pressure Trace Data I've taken over the last month:

190 SMK
41.8 gr. Varget
Lapua Brass
2.775" COAL

BR2: 2574 fps. (53809 psi)
210M: 2582 fps. (53979 psi)
WLR: 2574 fps. (54561 psi)
9 1/2M: 2595 fps. (54249 psi)
CCI 250: 2637 fps. (55726 psi)
WLRM: 2642 fps. (59221 psi)

Some brands are more potent than others. Going from a BR2 to a WLRM will get you in a lot of trouble. ALWAYS work up your loads if you change a component. Even with the ability to measure pressure, I would never just swap a component without first seeing where the pressure is at the starting load.
 
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