Magnum primers vs standard.

[Armadillofz1]

Was given a case of magnum cci small pistol primers. Any reason not to use them up on my 115gr 9mm loads?

 

[iH8DemLibz]

I wouldn't hesitate to use them.

Just start with minimum load data and work up.

You could even subtract 10% from the minimum it would make you feel safer.

 

[ultraplanet]

I have not needed to do it with my pistol loads but all my 223's get magnums. Just work up your load as describe above.

 

[Magnumite]

I've used Magnum Pistol Primers with Bullseye..carefully, when they were hard to find. No issues there.

 

[ihriec]

I've read that it's not a good practice to use magnum primers in 9mm, since it is a higher pressure caliber.

 

[Traveler]

I've read that it's not a good practice to use magnum primers in 9mm, since it is a higher pressure caliber.

This ^^

I have never seen a reloading manual call for magnum primers in 9mm.

I know, we have some here that just love to mix and match primers. I like my face and fingers more than that.

There is only a 3% chance you will have gruesome pictures to post here if you do, give or take a finger.

 

[atblis]

I personally wouldn't hesitate to use the CCI 550s in a moderate published load in the 9x19.

 

[Magnumite]

Not all loads need to be spec pressure loads. Mine were fairly mild, which is why I tried those primers in 9mm. As always, chop the load 10% or begin with starting charges when changing components.
I was actually hesitant trying magnum primers since Bullseye is such a fast powder. But my experience is it is a stable powder. I knew magnum primers are sometimes for cold weather loads and the intended load was mild. I thought the pressures would be safe. The load was mild so I loaded a handful and test fired 'em. No abnormal pressure signs, fairly mild recoil and report. GTG...

 

[Armadillofz1]

My training loads are middle of the road. .44 of PB under a 115g pill. I'll cook up 10 and try them out. Thanks.

 

[noahhh]

Use them in anything but max loads.

 

[Pinecone]

Somewhere online there used to be a test between different brands and standard and magnum primers.

In some cases, switching from standard to magnum, with a moderate load, pushed the pressures WELL above the max for the round.

IMO, if you want to use them, drop back to a minimum load and work up again.

 

[atblis]

I've found tests with measured pressures for magnum versus regular primers, but they were all for rifle cartridges.

This article has some interesting tid bits in it.
http://www.shootingtimes.com/ammo/ammunition_st_mamotaip_200909/

Interesting but pretty meaningless for this discussion, I recently used CCI 550s in place of CCI 500s in 357 SIG with Longshot and 90 gr bullets. Using the max charge published for 115 gr bullets I got 1650 fps v. 1750 fps for standard v. magnum primers. The rounds with the magnum primers had noticeably less muzzle flash and more consistent velocities. As to what the pressures were, I have no idea.

 

[tdt91]

Done it plenty with CCI and no issues

 

[Pinecone]

The article I mentioned was with pistol cartridges. And with one brand, switching from regular to magnum primers jumped the pressures by something like 9000 PSI.

 

[GlockMafia]

I realized my mistake this morning...I used CCI 550s in my 40 S&W loads, luckily only 200rounds. Here's what I'm using: 165 Ranier HP with 4.7 gr of Titegroup with a COL of 1.125

Any thoughts? Hodgdon lists the max load at 5.1 gr. I'm shooting a G23 and Sig 2340...

 

[Mike3888]

I realized my mistake this morning...I used CCI 550s in my 40 S&W loads, luckily only 200rounds. Here's what I'm using: 165 Ranier HP with 4.7 gr of Titegroup with a COL of 1.125

Any thoughts? Hodgdon lists the max load at 5.1 gr. I'm shooting a G23 and Sig 2340...

I've done it also. Mid pack load with h-38, I think your fine.

 

[Magnumite]

The article I mentioned was with pistol cartridges. And with one brand, switching from regular to magnum primers jumped the pressures by something like 9000 PSI.

Big increase, assuming that was done without cutting the powder charge. I agree....

 

[Blacksmith101]

Change a component work up a new load. It is simple it works and you may find a different sweet spot along the way. It is also the safe thing to do.

 

[GlockMafia]

I've done it also. Mid pack load with h-38, I think your fine.

I've lived through 2 kabooms in my 2nd Gen G19...I hope so. Thanks!

 

[brianns]

Watch out with .40sw. I understand they are naturally high pressured as normally loaded. A dealer once explained to me about non fully supported chambers, etc. and if I've noticed there weren't +p rounds in .40.

Set them aside for SHTF or pull the projectiles and disassemble.