Long Range Hunting Online Magazine


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

Reloading Techniques For Reloading


Reply

When to use Magnum primers?

 
LinkBack Thread Tools Display Modes
  #1  
Old 10-15-2010, 10:03 AM
Silver Member
 
Join Date: Jul 2007
Location: Lansing, MI
Posts: 185
When to use Magnum primers?

I'm wondering what the theory is behind Magnum primers and choosing when to use them? I've heard some guys switching to them for smaller rounds like a 6.5x47 Lapua with great result in accuracy, but I'm curious as to why this might be. Any thoughts?
Reply With Quote
  #2  
Old 10-16-2010, 06:13 PM
Silver Member
 
Join Date: Nov 2009
Posts: 297
Re: When to use Magnum primers?

In general you want to use a magnum powder when you have a long powder column you want to ignite or if you have a powder that is difficult to ignite. Some will say it is better to have a magnum primer if you shoot in really cold climates, sort of like an insurance policy to guarantee ignition when you are sighted in on Buckzilla or any his Zilla cousins like elk and moose.

I use magnum primers on my 7mm Rem Mag, and 300 Win Mag (before I sold it). I've tried them on my 45-70 and 25-06 and could not distinguish a difference from conventional primers so stopped using them in those cartridges.

Not sure why you would get desirable results in a short case. I don't want my primer dislodging the bullet, I want the powder to do that job. In my 221 Fireball the milder primers give the best accuracy by a wide margin.
Reply With Quote
  #3  
Old 10-17-2010, 04:47 AM
Platinum Member
 
Join Date: Jan 2007
Location: PA
Posts: 1,069
Re: When to use Magnum primers?

I have several competition rifles and have selected the primers with best accuracy, i.e. in the 6mmPPC, I use standard Federal 205; .223, its the CCI BR 4; 6mmBR, magnums seem better, so I use the CCI 450 or Wolf small rifle magnum. Also, 30BR, I use CCI BR4. In hunting rifles, I mostly use standard primers, but for cold weather hunts, I found the magnums ignite a little better. You have to test and compare primers.

Last edited by Gene; 10-17-2010 at 04:49 AM. Reason: spelling
Reply With Quote
  #4  
Old 10-17-2010, 02:28 PM
Platinum Member
 
Join Date: Dec 2001
Location: Winterville, NC
Posts: 1,490
Re: When to use Magnum primers?

A good case is one I ran across last weekend. I was loading the 70gn Ballistic Tip for my .243 using BLC(2). I selected the CCI BR2 and even though I was max or near max with the powder charge I was still getting the occasional hang fire. BLC(2) is a fine ball powder and a hotter flame, I feel, would eliminate this condition.
Cold weather could possibly be a reason to go to magnum primers but I think anytime you go over 60gns of powder it's beneficial to use a magnum primer. I remember reading the Fed215 was conceived for the Weatherby magnum rounds. JohnnyK.
Reply With Quote
  #5  
Old 10-17-2010, 06:17 PM
Silver Member
 
Join Date: Jul 2010
Location: Bozeman, MT
Posts: 153
Re: When to use Magnum primers?

I switched from a fed 215 magnum rifle to a winchester large rifle in my 7mag I gained a little accuracy and my ES improved quite a bit. I lost about 40fps velocity but I can use a little more powder if I want. It might be worth trying both, but if you are near max pressure back down a little if you go up to a magnum. I've meant to try the 215s in a couple smaller guns but haven't got around to it.
Reply With Quote
  #6  
Old 10-17-2010, 06:35 PM
Silver Member
 
Join Date: Jan 2008
Location: Missouri
Posts: 175
Re: When to use Magnum primers?

The Speer reloading manual I have generally recommends magnum primers for spherical, or ball powder.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: When to use Magnum primers?
Thread Thread Starter Forum Replies Last Post
Magnum primers in 25-06? Shooter98 Reloading 9 03-15-2011 06:26 PM
Magnum primers gonewest Reloading 3 04-13-2010 12:32 PM
to use magnum primers or not genecole Rifles, Bullets, Barrels and Ballistics 2 09-30-2009 09:01 AM
CCI Magnum Primers Available At ... Gettn2 Reloading 4 09-12-2009 02:43 AM
Large Rifle primers vs Magnum Small Rifle primers bwaites Reloading 4 09-06-2007 12:25 AM

Current Poll
Do you wear hearing protection while hunting?

All times are GMT -5. The time now is 10:45 PM.


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