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

Magnum Primers in a Low Power Load for 1873?

Discussion in 'Handloading and Reloading' started by Speedo66, Mar 22, 2013.

Thread Status:
Not open for further replies.
  1. Speedo66

    Speedo66 Member

    Joined:
    May 31, 2008
    Messages:
    3,605
    Location:
    Flatlandistan
    Like most people, I'm having difficulty finding primers.

    I use a low powered load in an original 1889 vintage Winchester '73, 5g. of Trail Boss pushing a 180g lead bullet. The loading tables show a min. load of 4.5g, max. load 5.5g, with pressure at 9,900CUP, well under the 14,000 limit.

    Question is, would it be safe to use a magnum large pistol primer rather then a standard primer with a 5g powder load?

    Thanks
     
  2. au_prospector

    au_prospector Member

    Joined:
    Aug 10, 2011
    Messages:
    731
    Location:
    North Georgia
    Uuphf......

    I have heard you could start at a load reduced by 10% for magnum primers. Key point in your post is you are shooting a vintage firearm, so I dont know if I would personally chance it. I have been seeing primers here and there so unless you are desperate to try a 10% reduced load I would wait a month or two.

    So you could go back to 4.5 grains and rework a load or you could wait until the proper primer is available. Did you mean to say Magnum Pistol?
     
  3. ny32182

    ny32182 Member

    Joined:
    Oct 17, 2003
    Messages:
    5,756
    Location:
    Clemson, SC
    I'd use the magnums, if you are at a starting load anyway the primer isn't going to amount to anything in the overall pressure level.
     
  4. Wil Terry

    Wil Terry Member

    Joined:
    Dec 26, 2002
    Messages:
    1,129
    Location:
    Black Hills, South Dakota, USA
    I HAVE SEEN MAGNUM PRIMERS take the starting loads from standard primers and push 'em to pressure levels above the MAX loads. WSPM's do it quite well sometimes.
    And so it goes...
     
  5. Speedo66

    Speedo66 Member

    Joined:
    May 31, 2008
    Messages:
    3,605
    Location:
    Flatlandistan
    Yes, I did mean large magnum pistol primer, I'm starting to run out of standard large pistol primers.

    Thanks
     
  6. Maj Dad

    Maj Dad Member

    Joined:
    Dec 1, 2005
    Messages:
    1,616
    Location:
    Carolina Low Country
    I don't have pressure testing equipment, but I use magnum large, small, rifle, and pistol primers almost interchangeably with standard, excepting maximum loads developed with standard. The difference in pistol cartridges with small starting loads is nil in my experience. I have never seen any indication of pressure, and I load 44-40 for my 1906 manufactured Win M92 with 200 and 240 gr bullets. Some say otherwise, like Wil Terry, but this is my experience over the last nearly 50 ( :eek: ) years.
    Cheers,
    George J.
     
  7. CraigC
    • Contributing Member

    CraigC Member

    Joined:
    Jan 27, 2006
    Messages:
    15,272
    Location:
    West Tennessee
    I think Terry has you beat on experience and with pressure testing equipment. ;)
     
Thread Status:
Not open for further replies.

Share This Page