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Loading 357 mag

Discussion in 'Reloading' started by bxny10455, Sep 10, 2011.

  1. bxny10455

    bxny10455

    173
    0
    Sep 12, 2008
    Southern Cal
    I'm about to load 357 mag, all i have are Winchester sp & Tula SP. Hornady manual calls for WSPM, can I load them with WSP?
    Thanks in advance.


    "They who can give up essential liberty to obtain a little temporary safety, deserve neither liberty nor safety"- Benjamin Franklin
     
  2. The-Fly

    The-Fly The Bofh

    1,350
    0
    Apr 27, 2005
    Colorado
    depends on what powder you're using.

    H110 for example, has to have magnum primers.......
     

  3. bxny10455

    bxny10455

    173
    0
    Sep 12, 2008
    Southern Cal
    I have Unique, Bullseye, HP-38, 2400, TG, & H110.


    "They who can give up essential liberty to obtain a little temporary safety, deserve neither liberty nor safety"- Benjamin Franklin
     
  4. EOD3

    EOD3

    566
    0
    Oct 19, 2000
    Indiana
    NORMALLY, using a less powerful primer will not increase chamber pressure.

    If you're planning to load H110, it'll probably be OK provided you're not shooting in cold weather BUT BUT BUT, you need to be aware of possible squib-loads. If a shot doesn't sound right, STOP and check for possible bullet-in-barrel obstruction.

    The other powders you listed SHOULD light just fine with the weaker primer.

    It is ALWAYS a good idea to find load data for the components you have on hand. There are several on-line reloading guides.

    All of my reloading books are packed away pending our move to our permanent home in Indiana but someone here must have some small primer load data. You'll need to list the exact bullets you're using.
     
    Last edited: Sep 11, 2011
  5. bxny10455

    bxny10455

    173
    0
    Sep 12, 2008
    Southern Cal
    I have the latest hornady edition & the Lyman. Both manuals call for spm primer.
    Btw I'm using 158g RNFP & LSWC.


    "They who can give up essential liberty to obtain a little temporary safety, deserve neither liberty nor safety"- Benjamin Franklin
     
  6. Zombie Steve

    Zombie Steve Decap Pin Killa

    18,083
    19
    May 31, 2007
    Old Colorado City
    I'd say use your Unique for mid-range loads, 2400 for your full power and a standard small pistol primer for both. :thumbsup:
     
  7. ColoCG

    ColoCG

    936
    0
    Mar 18, 2011
    Colorado
    As others have said, if your using H110/W296 you should use magnum primers. The other powders you have small pistol primers will be fine.
     
  8. fredj338

    fredj338

    22,662
    1,443
    Dec 22, 2004
    so.cal.
    ^^This^^^ Just because it says magnum doen't mean yo have to use mag primers. The only time I ever use mag primers is w/ H110/W296 in any of magnum rounds from 357 thru 44mag & heavy 45colts, just not needed otherwise.
     
    Last edited: Sep 11, 2011
  9. Gunnut 45/454

    Gunnut 45/454

    12,129
    9
    Jun 20, 2002
    Agree sp for all your powders except the H110 use only Mag primers with it! You can load some pretty snappy loads with the Unique powder!:supergrin:
     
  10. PhantomF4E

    PhantomF4E

    1,094
    3
    Aug 24, 2010
    South Florida
    :fred:Waiting for Jack's Unique banner .........