Quantcast
  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

magnum primers for non-magnum loads

Discussion in 'Handloading and Reloading' started by nooooobie, Jun 25, 2013.

Thread Status:
Not open for further replies.
  1. nooooobie

    nooooobie Member

    Joined:
    Jun 7, 2013
    Messages:
    14
    I can't find large rifle primers right now. I am using H380 powder, 168gr. berger bullets. I can get magnum primers, but don't want to destroy my Rem 70 or my happy visage. If I go with a minimum charge of powder, am I going to blow myself up using magnum primers?
     
  2. jwrowland77

    jwrowland77 Member

    Joined:
    Apr 8, 2012
    Messages:
    2,293
    Location:
    Central Arkansas
    Just start low and work up and you'll be good.

    I'm going to be using a LRP magnum in my .308, mainly because I shoot a lot
    of 7mm RM and don't want two different types of LRP in my stash. I'll be starting low and working up.
     
  3. jwrowland77

    jwrowland77 Member

    Joined:
    Apr 8, 2012
    Messages:
    2,293
    Location:
    Central Arkansas
    In addition, only difference between LRP and LRPM is the magnum primer burns hotter, longer.

    Start low and work up. Easy peasy.
     
  4. merrill

    merrill Member

    Joined:
    Nov 2, 2011
    Messages:
    213
    Ive been using LRM primers in my .270 Winchester and no problems, but I use pretty hot loads. 130 gr. bullet over 60 gr. Supreme 780.
     
  5. ArchAngelCD

    ArchAngelCD Member

    Joined:
    Nov 25, 2006
    Messages:
    22,673
    Location:
    Northeast PA, USA
    A magnum primer will burn slightly longer and slightly hotter than a standard primer. They will not create a nuclear explosion!

    Don't feel bad, the marketing weenies have made people believe magnums are super hot and anything +P will blow up anything but the strongest guns. Neither are true, load up those magnum primers and go shooting. Like when you change any other component, drop back some and work back up. I'm guessing you will fine with a magnum primer you will probably use a few grains less powder to achieve the same velocities as when you use a standard primer.
     
  6. Grumulkin

    Grumulkin Member

    Joined:
    Dec 1, 2005
    Messages:
    2,587
    Location:
    Central Ohio
    I have frequently, in the quest to find a better load, tried magnum primers in various rifle loads. In cartridges the size of a 308 Winchester and larger, I've never found the need to change the powder charge at all when using magnum primers.

    Once I even tried large rifle magnum primers in 44 Magnum cartridges to light H110. In that instance I had to reduce the powder charge by 1.5 grains.
     
  7. jmr40

    jmr40 Member

    Joined:
    May 26, 2007
    Messages:
    10,441
    Location:
    Georgia
    It is commonly done and many report better accuracy with magnum primers. I actually started with magnum primers and switched to WLR primers with the same loads. Velocity dropped by less than 25 fps with my 308 and 30-06 loads and I noted no difference in accuracy. I did not change my loads at all when changing to standard primers. It might be a good idea to reduce your loads a little if you are right at a max load now.
     
  8. Arkansas Paul

    Arkansas Paul Member

    Joined:
    Mar 18, 2009
    Messages:
    7,413
    Location:
    Central Arkansas
    :)
    No worries friend. It's already been said, but the key is to not start high. They give you minimum and maximum for a reason. Start at the minimum and work your way up, looking for pressure signs along the way. Find the most accurate load for your rifle that's within the alloted limits and have fun.

    This is the way you should do it whether you're shooting standard or magnum primers.
     
Thread Status:
Not open for further replies.

Share This Page