The Firing Line Forums

Go Back   The Firing Line Forums > The Skunkworks > Handloading, Reloading, and Bullet Casting

Reply
 
Thread Tools
Old January 11, 2006, 11:31 AM   #1
Barr
Senior Member
 
Join Date: January 5, 2006
Location: Upstate SC
Posts: 270
Primer's Impact upon Pressure

First, I know that you are not supposed to mix and match primers with recipes given in reloading manuals. I wonder how much primers affect pressure in the cartridge.

Secondly, I know that pressure is a function of volume. To make things simple let's consider the 9mm Parabellum Cartridge. It has a limited case capacity so primers should have a much greater effect on pressure than a large bore cartridge. The primers that I am interested in loading with are the Federal F100, CCI 500, and the Winchester WSP. My understanding is that the Winchesters are the "hottest".

My question is....Does anybody have any concrete numbers on these primers and how much they effect cartridge pressures?
Barr is offline  
Old January 11, 2006, 01:02 PM   #2
Leftoverdj
Senior Member
 
Join Date: October 15, 2004
Posts: 934
Primers don't have enough effect on pressures to worry about in the normal metallic cartridge loading range. Switching primers might matter on very hot or very soft loads, but not in the midrange.

There are a handful of powders, mostly rifle powders, that need magnum primers. Primer changes can affect accuracy, but people make way too much fuss about them.

Use any of the primers you mentioned in the 9mm and it will work fine.
Leftoverdj is offline  
Old January 12, 2006, 07:45 AM   #3
caz223
Senior Member
 
Join Date: May 15, 2002
Location: Michigan
Posts: 1,383
Standard primers in the 9mm caliber are pretty much interchangeable.
I prefer standard primers as opposed to "for standard or magnum loads".
The bullet has WAAAAAAAAYYYY more to do with accuracy than primers, at least in 9mm and most other "standard" calibers.
10mm isn't what I'd consider a "standard" caliber, BTW.
__________________
I'm not just a gun.
I'm YOUR gun.
(Hold me.)
caz223 is offline  
Old January 13, 2006, 06:37 AM   #4
WESHOOT2
Senior Member
 
Join Date: February 20, 1999
Location: home on the range; Vermont (Caspian country)
Posts: 14,189
science

"...in MY gun..."

That's the correct question: how do different primers affect things in MY gun?

Actual pressure testing has shown us up to 5,000PSI differences.
Testing reveals certain combinations can visibly affect accuracy.

I test.


all guns are always different; my chamber or yours? my throat or yours? my breechface or yours? etc.
__________________
.
"all my ammo is mostly retired factory ammo"
WESHOOT2 is offline  
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 02:20 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
This site and contents, including all posts, Copyright © 1998-2014 S.W.A.T. Magazine
Copyright Complaints: Please direct DMCA Takedown Notices to the registered agent: thefiringline.com
Contact Us
Page generated in 0.06403 seconds with 9 queries