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Thread: 357 Magnum powder

  1. #21
    Boolit Master
    Join Date
    Jul 2013
    barry s wales uk
    Ramshot true blue meters well and clean burning very similar burn rate to unique 7 gr with 158 gr boolits work well for medium loads.

  2. #22
    Boolit Buddy
    Join Date
    Mar 2008
    Can somebody explain about the powder bulk density, and how it relates to reloading?

  3. #23
    Boolit Grand Master

    dragon813gt's Avatar
    Join Date
    Feb 2012
    Somewhere in SE PA

    357 Magnum powder

    Quote Originally Posted by sniper View Post
    Can somebody explain about the powder bulk density, and how it relates to reloading?
    High density means you can fit a higher charge in the case in relation to a low density powder. Say the high density powder allows a ten grain charge. A powder that's half as dense will allow a five grain charge. These are made up numbers but I'm hoping it paints a picture. And I think I have high and low the right way.

    Typically a powder burns more completely and efficiently when the case is almost full. So people will use a powder that gives you this while still being the correct burning rate.

  4. #24
    Boolit Bub
    Join Date
    Apr 2015
    SE Pennsylvania
    I have had great groups using Alliant 2400 in the .357mag... caste or jacketed, it's versatile enough for both, with very good accuracy. That said, I use 2400 for full power caste, and Hogdon's Lil Gun for Jacketed...

  5. #25
    Boolit Buddy
    Join Date
    Aug 2007




    Normally Iíd have recommended 14.5gr WW296.

    Given your desire for lower vel, Iím going to recommend an old Skeeter Shelton load:
    8gr IMR4756 and regular SP primer, under a (Lyman) SWC of 158gr. Boolit weights up to 172gr shoot well also, in my experience.

    Iíve heard 4756 is on itís way out, and it is a tad sooty; but still..... a lot of fun can be had from just one can.

    With regards,

  6. #26
    Boolit Master gpidaho's Avatar
    Join Date
    May 2014
    Beautiful Idaho
    I'm also a VV N-110 fan. And I've burned a lot of Blue Dot in 357mag and 41mag. The only problems I've had with the BD is the stinging sensation you get in your shooting hand when you burn a heavy load in one of those light weight 357 snub nose revolvers. Gp

  7. #27
    Boolit Mold
    Join Date
    Oct 2013
    1+ on the 2400.
    Iíve had the best results among the various powders Iíve tried in 357 mag with 2400 powder. I use 190 gr cast. Very accurate, but I do think it may be less tolerant of variations in charge wt as I occasionally notice flat primers in what should be a safe load.

  8. #28
    Boolit Master
    Join Date
    Jul 2015
    I actually load a LOT of 357 with a stiff load of Promo (red dot equivalent).

    Promo is king of the lowest $/bang ratio.

    It is also bulky. From the chart referenced in post 19, only Hodgon Clays is bulkier.

    You can use at least 5 gr with any boolit up to 158 gr. With a 5 gr or more load, a double charge will almost fill the case. With the least little bit of care, the chance of a double charge is next to zil.
    Last edited by P Flados; 03-08-2018 at 11:49 PM.

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check