close
Long Range Hunting Online Magazine


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

Reloading Berger Bullets

Reply

Question about using a large rifle primer in a 300 win?

LinkBack Thread Tools Display Modes
  #1  
Unread 09-05-2011, 03:38 AM
Junior Member
 
Join Date: Feb 2009
Posts: 4
Question about using a large rifle primer in a 300 win?

I have a 300 win mag that I'm working up a load for. I'm shooting 190 Bergers and have 2 loads that shoot very well. One is with reloader 22 and the other with H4831sc, neither is a max load. I'm also using CCI-250(mag primers). I have seen more than one posting in the past stating that people are getting better accuracy using non-magnum primers in the 300 win. I have not tried this yet, but my concern is that I primarily use this rifle for deer and elk during late seasons in the Rocky's where the temp can be very low. Can anyone tell me if they have experience with non magnum primers in the magnum rounds and if cold weather is going to give me trouble with accuracy? Unfortunately, I live in California and really don't have much chance to shoot and work up loads in colder conditions. Any help would be appreciated.

Pat
Reply With Quote
  •   #2  
    Unread 09-05-2011, 08:28 AM
    Platinum Member
     
    Join Date: Jul 2004
    Location: Texas
    Posts: 6,927
    Re: Question about using a large rifle primer in a 300 win?

    Quote:
    Originally Posted by Patw View Post
    I have a 300 win mag that I'm working up a load for. I'm shooting 190 Bergers and have 2 loads that shoot very well. One is with reloader 22 and the other with H4831sc, neither is a max load. I'm also using CCI-250(mag primers). I have seen more than one posting in the past stating that people are getting better accuracy using non-magnum primers in the 300 win. I have not tried this yet, but my concern is that I primarily use this rifle for deer and elk during late seasons in the Rocky's where the temp can be very low. Can anyone tell me if they have experience with non magnum primers in the magnum rounds and if cold weather is going to give me trouble with accuracy? Unfortunately, I live in California and really don't have much chance to shoot and work up loads in colder conditions. Any help would be appreciated.

    Pat
    I find that non magnum primers work very well in all but the very largest cartriges.

    In cases with a powder capacity of less than 90 grains I actually have lower SDs than with
    magnum primers.

    The velocity is slightly higher with the mag primers but not much and the lower SDs of the
    non magnum primers makes it more attractive to me.

    Also the powders you mentioned are not that hard to light in cold weather.

    With the very slowest powders, magnum primers are sometimes needed when case capacity
    exceeds 100 grains.

    J E CUSTOM
    __________________
    "PRESS ON"
    Reply With Quote

      #3  
    Unread 09-05-2011, 01:33 PM
    Silver Member
     
    Join Date: Oct 2008
    Location: New York, NY
    Posts: 272
    Re: Question about using a large rifle primer in a 300 win?

    I too like the non mag primers in most cartridges up to and including the 338 lapua. One time I ran out of mags and built up loads with the standard and found group sizes shrunk and grew the same relative to charge weight but that the non magnum primers groups were exactly half the size as the ones for the same charge weights with mags. I use the non mags in virtually all but the most extreme condition gun, and think you will find the same.
    Best,
    Don
    Reply With Quote
      #4  
    Unread 09-05-2011, 04:46 PM
    Junior Member
     
    Join Date: Feb 2009
    Posts: 4
    Re: Question about using a large rifle primer in a 300 win?

    Thanks for the input, I thought I had seen others post similar info. Would you both just change the primer and leave everything else the same? The two powders I listed are shooting good, one is slightly under .5 MOA and the other is slightly over .5, but I don't see any reason not to improve if possible! it certainly won't matter in hunting, but I also enjoy punching holes in paper.

    Thanks again for the input
    Pat
    Reply With Quote
    Reply

    Bookmarks

    Thread Tools
    Display Modes


    Similar Threads for: Question about using a large rifle primer in a 300 win?
    Thread Thread Starter Forum Replies Last Post
    SOLD - R. W. Hart case saver swage for large primer pockets - SOLD ELR Researcher Reloading Equipment and Components 0 08-14-2011 04:07 PM
    Large caliber question racerngr1 Long Range Hunting & Shooting 14 08-14-2011 03:43 PM
    Can't find primers in large rifle mag or large pistol mag tax_cpa Reloading 31 03-19-2009 11:27 AM
    FS--R W Hart Case Saver Swage for Large Primer Pockets--SOLD jmden Reloading Equipment and Components 2 09-20-2008 08:21 AM
    Magnum Large Rifle Primer Question bgordon Rifles, Bullets, Barrels & Ballistics 4 03-24-2002 11:09 AM


    All times are GMT -5. The time now is 09:00 AM.


    Powered by vBulletin ©2000 - 2016, Jelsoft Enterprises Ltd.
    Content Management Powered by vBadvanced CMPS
    All content ©2010-2015 Long Range Hunting, LLC