Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Rifles, Reloading, Optics, Equipment > Reloading

Reloading Techniques For Reloading


Reply

Flattened Primers?

 
LinkBack Thread Tools Display Modes
  #1  
Old 03-26-2010, 01:02 PM
Bronze Member
 
Join Date: Jan 2010
Location: West Virginia
Posts: 38
Flattened Primers?

Hi Folks,
I'm really not certain what a flattend primer (that i should be worried about) looks like.
After i shoot any bullet from min to max out of my 7mmRM, the primer never looks exactly like a brand new primer. It is always flatter.

I do not see any cratering from the firing pin but the primers are certainly flatter.

How do i know if i have a problem?
Reply With Quote
  #2  
Old 03-26-2010, 03:25 PM
Silver Member
 
Join Date: Apr 2007
Location: Fort Morgan, Colorado
Posts: 325
Re: Flattened Primers?

Reading primers isn't totally reliable for determining chamber pressure but it certainly is a decent indicator. In my limited experience when the entire visible surface of the primer is flattened and the edge of the primer is almost indistinguishable you are in very excessive pressure. Usually when the primers are showing this deformation the case heads are also showing shiney spots, and often bolt lift is stiff when extracting the empty case.
__________________
Dennis
Reply With Quote
  #3  
Old 03-26-2010, 03:34 PM
Silver Member
 
Join Date: Jul 2008
Posts: 279
Re: Flattened Primers?

I am interested in seeing the responses to this topic. I question how good of an indicator they really are. I shoot an 06 and have had several factory loads with completely flattened primers.(Hornady and Winchester) Keep in mind that factory 06 ammo is designed to operate below 60,000 psi. Considering the same primers are used in a 270 which operates at 65,000 psi I have my doubts about flattened primers as a "tell all" pressure sign.
Reply With Quote
  #4  
Old 03-26-2010, 03:41 PM
mkg mkg is offline
Silver Member
 
Join Date: Nov 2007
Location: Satillite Beach, Florida
Posts: 178
Re: Flattened Primers?

http://cqbarms.com/photos/albums/use...ssureSigns.gif

Here are some pictures from another thread .
Keep in mind that some primers are "softer" than others and will show pressure signs quicker.

In my experiance federal are softer than CCI and CCI are softer than Winchester.

Mike
Reply With Quote
  #5  
Old 03-26-2010, 04:11 PM
Silver Member
 
Join Date: Nov 2008
Location: Lincoln, NE
Posts: 185
Re: Flattened Primers?

For me, the Win primers were softer than CCIs BR primers...load that flattened WLR primers didn't flatten the BR2s...

Brian
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: Flattened Primers?
Thread Thread Starter Forum Replies Last Post
Question about flattened primers? MSLRHunter Reloading 8 11-08-2010 10:51 PM
New .223 & Flattened primers Varmint Hunter Reloading 3 06-21-2009 08:10 AM
Flattened primers, a miss fire, and worries about headspace.... cdherman Reloading 4 09-03-2008 11:28 PM
'Flattened' primer pictures? captdavid Reloading 11 11-06-2006 05:26 AM
flattened primer? bigsal5353 The Basics, Starting Out 2 03-10-2004 10:18 AM

Current Poll
In the last 12 months, what was your longest rifle kill on big game?
0 to 200 yards - 25.96%
1,531 Vote
201 to 400 yards - 32.12%
1,894 Vote
401 to 600 yards - 23.08%
1,361 Vote
601 to 800 yards - 10.01%
590 Votes
801 to 1,000 yards - 3.92%
231 Votes
Over 1,000 yards - 4.92%
290 Votes
Total Votes: 5,897
You may not vote on this poll.

All times are GMT -5. The time now is 05:53 AM.


Powered by vBulletin ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Management Powered by vBadvanced CMPS
All content ©2010-2014 Long Range Hunting, LLC