Substitute Small "Magnum" Pistol with "Standard" Small Rifle Primers?

[detox]

I have no small "magnum" pistol primers, but i have lots of "standard" small rifle primers. So i have been using the standard small rifle primers in my 357 Magnum. The Vihtavouri Cowboy load data sheet states that Small Rifle primers were used during load development of the 357 magnum. What is the difference between these two primers?
http://www.lapua.com/en/products/reloading/vihtavuori-reloading-data/relodata/7/96



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[aspangler]

The rifle primers will require a little harder hit to ignite than the Pistol primer. It'll work but depending on your firing pin and or spring you may have a few misfires.

[detox]

I know the newer AR15 style Small Rifle primers have stronger cups to prevent slam fires in the AR. Some say standard small rifle primers are too soft to be used in the AR. I myself have not had any problems with slam fires in my AR using standard primers.

[Lloyd Smale]

ive switched between small pistol mag and small rifle both ways. Rumor has it the at least with cci there the same primer in a differnt package.

[Lloyd Smale]

ive used many cci small pistol mags in my ars without any troubles at all. Had to do it durning the last shortage or not be able to shoot them.
I know the newer AR15 style Small Rifle primers have stronger cups to prevent slam fires in the AR. Some say standard small rifle primers are too soft to be used in the AR. I myself have not had any problems with slam fires in my AR using standard primers.

[nighthunter]

CCI 400 and CCI 550 are the same primer in different boxes. This information came straight from CCI when I bought primers with both in the same package of 1000.

Nighthunter

[zxcvbob]

I've been using small rifle primers instead of small magnum pistol primers for *years*. I would be leery of going the other direction (it should work, but they might be too sensitive, or rupture too easily -- or they might be fine)

[Jayhawkhuntclub]

CCI 400 and CCI 550 are the same primer in different boxes. This information came straight from CCI when I bought primers with both in the same package of 1000.

NighthunterThanks, I never heard that before. Could come in handy someday.

[Harry O]

I did that when I was not able to get small rifle primers. It was in the 30cal Carbine cartridge. Of course, that has a lower pressure than most rifle cartridges, but I had no problems with the substitution at all.

[BAGTIC]

I tried small rifle primers in my .357 Mk III Trooper. They worked fine single action but there were some misfires double action.

[dragon813gt]

I stopped using SP Magnum and switched to SR so I don't have to stock as many varieties. They've fired in all of my 357s w/ no issues. As usual if you are switching from one to another. Rework the load back up. I doubt there will be much difference but better to play it safe.

[Slow Elk 45/70]

Nice post /subject, I've used them both ways with no problems with CCI, can't speak to other brands.

[jonp]

I've interchanged them with not problem but have not tried small pistol magnums in my AR's only my pistols.

[singleshot]

I've played with this in 45 acp small primer brass, and haven't had any problems subbing SR primers for SP primers in several different brands. I started with a "beginning" load and worked up with each load combo, no problems.

[Mugs]

Like dragon813gt says cuts down on stock. Been using SR for every thing small for years.

Mugs

[.429]

I tried small rifle primers in my .357 Mk III Trooper. They worked fine single action but there were some misfires double action. what brand of primers where u using?

[300blk]

I've played with this in 45 acp small primer brass, and haven't had any problems subbing SR primers for SP primers in several different brands. I started with a "beginning" load and worked up with each load combo, no problems.

Ive used small rifle in moderate 9mm loads as well, usually 124 lrn with 3.5 titegroup.
Shortages kinda suck... Gotta make do.

[HighHook]

Great subject and very usefull information.

[BAGTIC]

I have been using CCI almost exclusively since 1960.

[762cavalier]

so, does it work the same with Large pistol magnum and large rifle primers as well

[turmech]

so, does it work the same with Large pistol magnum and large rifle primers as well
No LP and LR are not the same. The LR are too long to seat fully in pistol cases. The LP in turn can be seated too deeply in rifle cases.

[detox]

I do use Winchester Large Pistol primers in my reduced charge 30-30 loads. The LP primer seats a little deaper in the 30-30 case, but works without misfiring. Lots of people also use the Winchester LP primers in Black Powder 45-70 loads.

You do not want to use LR primers in large pistol cases because the primer will extend out of case. Some guns may not chamber round because of taller primer cup.

[.429]

Joe, we package 2 different primers, they are different and should not be used as the same.


Make Every Shot Count!
Justin M.
CCI/Speer
2299 Snake River Ave
Lewiston, ID. 83501




-----Original Message-----
From: jxxxxxxx8@yahoo.com [mailto:jxxxxxxx8@yahoo.com]
Sent: Thursday, August 08, 2013 8:01 PM
To: cciexpert
Subject: CCI Ammo - Ask the Expert Form





are small pistol magnum primes the same as small rifle primers? thanks

");

[.429]

that was a reply to an email that i sent to CCI. they sent that reply this am

[mroliver77]

Some years ado one of our members did a lot of primer tests for power and brisance if I remember correctly. The reults were eye opening!
J