Powder recommendation for 125g. 357 please.

Discussion in 'The Ammo & Reloading Forum' started by Mixed Bang, Mar 2, 2010.

  1. Mixed Bang

    Mixed Bang New Member

    Jan 26, 2010
    I use HP38 to load 9mm, 38Spl and 45acp on a Dillon 550B.I plan to start loading 125g. jacketed 357 for target/plinking.I use these sources for load data:Hodgdon, Hornady,Lee, Lyman and Speer.I want to use ball-type powder. 4 of the 5 give data for IMR4227, a different 4 give data for 2400. I was pleasantly suprised that 3 of them give data for HP38/W231 (I already am stocked). Speer says to use standard primers for 2400 and HP38.
    Would you folks please give me advice. Thanks
  2. Alpo

    Alpo Well-Known Member

    Feb 3, 2007
    NW Florida
    My favorite 357 loads (125 JHC and 158 lead SWC) both use WW 296. You could also use H110. It is the exact same powder. Takes magnum primers, though. 18.5 grains with the JHC. Got that data from on old Winchester book. The Hodgdon site gives a heavier load, I believe, but this one works for me.

  3. LDBennett

    LDBennett Well-Known Member

    Dec 20, 2003
    Hesperia, CA
    It really depends on what you are after. For a "man sized load" you have to use the slower powders like 2400, H110/W296, IMR4227, AA#9 or one of several others. For economy of shooting HP38/W231 works just fine.

    The hottest HP38 load is lighter than the starting load for H110. The difference is about 450 FPS but even the hot load of HP38 is over 1500 FPS and uses about 1/3 the amount of powder. That means for a pound of powder you can get three times the ammo. That's a significant difference if all you want is for the gun to go bang, recoil a bit, and hit the target. And typically HP38 is cheaper by the pound than the slow powders.

    I shoot HP38/W231 in my 125 gr 357Mag load. The paper target don't seem to complain nor do I from the not as sharp recoil. But only you know what will satisfy you and go for it, whatever it might be.

  4. Oneida Steve

    Oneida Steve Well-Known Member

    Sep 28, 2006
    Upstate NY
    I would recommend 2400 powder. 2400 has been my favorite for full-power .357 loads since the 1980's. I've also used WW 296 (good stuff) but I prefer 2400.
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