It's all about Magnum. ...

[Jedabug92]

...primers, what would happen if I put a large rifle magnum primer in my .308?

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[Mitch Rapp]

You should definitely not try it. I would strongly not advise starting with a max load.

 

[Jedabug92]

You should definitely not try it. I would strongly not advise starting with a max load.

No not max load, I mean using a magnum primer on a non max load

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[swampratt]

I tried magnum and non in my 357 mag with a good load of 2400 powder and the accuracy was better with non magnum but the book calls for magnum.

I am one to try many experiments, I loaded my 30-06 with H4350 and found a sweet spot with the 155gr sierra palma at 3176fps with a 22"
barrel.
Too bad that bullet penciled through deer.

 

[Jedabug92]

I tried magnum and non in my 357 mag with a good load of 2400 powder and the accuracy was better with non magnum but the book calls for magnum.

I am one to try many experiments, I loaded my 30-06 with H4350 and found a sweet spot with the 155gr sierra palma at 3176fps with a 22"
barrel.
Too bad that bullet penciled through deer.

Wait. What

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[swampratt]

I said I will try it!!
Aint skeered.

 

[Jedabug92]

Oh. I wanna try it too!!

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[HiredHand]

"Magnum primers are "hotter" than standard primers. CCI/Speer typically recommends that magnum primers be used with ball (or spherical) powders, when loading magnum or other large capacity cases, and when it is anticipated that the cartridges will be used at temperatures below 20 degrees F. Ball powders are generally harder to ignite than flake and extruded powders and magnum primers are often called for, even in non-magnum rifle and pistol cartridges. Let your reloading manual be your guide to primer selection."

source: http://www.chuckhawks.com/primers.htm

 

[HiredHand]

Here's another article that might be worth a quick read. http://www.loaddata.com/articles/PDF/BenchTopics 56 LR.pdf

 

[jc5420]

Just pick a primer and run with it, I have used mags and non mags in 223, 308 and have seen no performance gain or lack of when going through load development. Some will shoot better than others, just let the rifle decide what it likes.