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Powder recommendations for .357 magnum

Discussion in 'Reloading' started by Glock21sf-miami, Apr 13, 2010.

  1. Glock21sf-miami


    Jul 25, 2008

    I already loaded up some .38 and now I want to play a little with .357 magnum loads. I have W231 (for .38 and .45) and WST (for .45).
    I would like to create some mild to hot loads for .357 and have some 125 gr XTPs and some 110 gr XTPs that came free when buying the dies.

    I am also getting ready to buy a case of bullets for .38 and .357, I would like to know which flavor (grs) I should buy so I can use them for both loads...

    Any suggestions?
    Last edited: Apr 13, 2010
  2. mitchshrader

    mitchshrader Deceased

    Jun 14, 2005
    There are heavy bullet loads worked up for 158/180 grain with Lil Gun and 2400 posted online.. various other powders but I don't know how many.

  3. For full power loads I've used Win296. Blue Dot as long as you heed their warning on using with 125 grain projectiles.
  4. dudel


    Dec 10, 2008
    Texas Hill Country
    Partial to H110 for 357Mag/Max. It's what I started with, and it's worked well all these years. There may be better powders out there; but I'm not ready to try a pound of stuff just to have it sit on the shelf. BTW, I use the H110 with jacketed projectiles.
  5. Hydraulicman


    May 21, 2007
    i've loaded 357 with 2400 and w296

    I tend to prefer W296 but i meter the powder with my RCBS uni-flow instead of my dillon measure( gets powder all over the place)

    I load my .357 to magnum loads

    if i want lite load i use .38 brass
  6. byf43

    byf43 NRA Life Member

    Apr 13, 2006
    Southern Maryland
    7.2 grains of Unique with a 158 gr JHP for an accurate, 'pooty-tat' load, and a judicious load of Alliant 2400 for 125 and 158 gr JHP/JSP loads.

    I've never been a fan of H-110 or W-296.
    The pressure curve is instantaneous, like a Top Fuel Dragster. 0-300 mph in a heartbeat.
    Nope. Not for me.
  7. fredj338


    Dec 22, 2004
    H110, W296, 2400, all great choice for full power 357mag loads w/ lighter bullets. Unfortuantely, none fo those are really good for medioum vel 110-125grJHP loads. Think medium burners, like Unique, WSF or HS6, maybe Longshot too. BlueDot also works, but again better for max loads, not midrange. Any of those will get your 125grJHP to 1350fps (4"bbl) or so w/o bending anything.
  8. albyihat


    Aug 3, 2007
    SW Montana
    2400 is great but blue dot and unique are also good.
    17gr of 2400 for a 125gr bullet using a mag primer ( a regular primer can be used as well if shooting out of 6" or larger brl. for shorter brl. i use mag primer as i see less unburnt powder) this is a almost full power load adding more powder did not result in much more fps. at least for me. Have fun.
  9. Glock21sf-miami


    Jul 25, 2008
    Great info! Lyman lists Unique as an option when loading with 110, 125 and 158 gr bullets. What I like about Unique is that seems to be very versatile and works with 45 acp as well.
  10. fredj338


    Dec 22, 2004
    Yes it does, why it's been around for like 100yrs (although it has been improved). WSF is nearly identical in burn rate in most calibers & meters a bit better.
  11. I've been using AA#7 with 158 grain cast SWC's with pretty good results. I bought it because I couldn't find BlueDot. It also works well in the 40 S&W. Doesn't seem to have the flash BlueDot is known for.

    All the Best,
    D. White
  12. Ahmid

    Ahmid CLM

    Feb 6, 2007
    Don't forget AA number 9....
  13. Zombie Steve

    Zombie Steve Decap Pin Killa

    May 31, 2007
    Old Colorado City
    Unique for lower end, 2400 to realize the potential of the round.
  14. glocknick


    Aug 2, 2009
    i like winchester 296. you can make some rowdy rounds with them. the only other powder i have used in 357 is hp38. it was ok but if you want medium to full power go with 296.
  15. fredj338


    Dec 22, 2004
    W296/H110 are NOT recommended for downloading, so they are full power choices only & not very good for light bullets in any magnum IMO.
  16. byf43

    byf43 NRA Life Member

    Apr 13, 2006
    Southern Maryland

    Great post, fred.

    That is the reason I don't like W-296 or H-110.
    Full power only. No room for margin. Wipe open throttle or nothing.

    A lot of people don't like 2400 because they say "It's dirty."
    Well, I clean my firearms after each shooting session, so, I don't care if it's dirty.
    (And 'clean shooting' is a relative term, anyway!):supergrin:
  17. dbarry

    dbarry Silver Member

    Feb 15, 2010
    the Buckeye state
    For my "what the heck is that guy shooting" loads in the 357, 2400 is my vote. Very fun with light bullets and lots-o-powder. Huge fireball out the end of the barrel. Big fun!
  18. dbarry

    dbarry Silver Member

    Feb 15, 2010
    the Buckeye state
    btw: with the full power loads, I dont notice the gun being any more dirty than with any other powder. As you back down on the powder, it does get dirty, but then again so do most other powders.
  19. ilgunguygt

    ilgunguygt Enslaved in IL

    I prefer 2400 in my hot 45 colt and 357 magnum loads.
  20. bambikilr


    Oct 29, 2009
    H110 is what is use with 158 & 140 grain bullets in .357 & have for over 20 years...7.9gr of HP38 is good with your 125gr Hornady...good luck, have fun & be safe
    Last edited: Apr 14, 2010