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Thread: Lyman 358156 357 mag loads?

  1. #1
    Boolit Master brewer12345's Avatar
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    Lyman 358156 357 mag loads?

    I have some beautiful boolits made up with this mold (the Johnson SWC) and gas checked and lubed they come in at 161 grains. I am trying to come up with a mid range magnum load with these using powders I have on hand. I started with Unique and tried 6, 6.5 and 7 grains today without much success. The hits on target began to approach a group as the powder charge went up, but even the 7 grain load was less than impressive. I would be willing to go higher, but it seems like every load manual I can find with unique and a lead bullet tells me that 6 grains is the max. Alliant lists a 158 grain jacketed bullet as maxing out at 7.7 grains, but not sure how well that would translate to a gas checked lead boolit.

    So I would appreciate any wisdom that people might wish to contribute on this one. How much higher can I go with Unique? I can switch to another powder that I have on hand (HP38, Longshot, Universal seem like candidates).

    Incidentally, I tested a few lil gun loads in the 357 carbine with Sierra 158 grain JSPs. At 16.5 grains of powder it was very accurate. Given what I have seen for published velocities out of shorter barrels (mine is 24"), this load was probably screaming out of the barrel at close to 2000 FPS. Should be the bees' knees for hogs inside 100 yards.

  2. #2
    Boolit Master brewer12345's Avatar
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    Quote Originally Posted by tazman View Post
    Check out the Hodgdon data site for loads using the other powders you mentioned.
    http://www.hodgdonreloading.com/data/pistol
    Eh, they include my pet peeve of reloading data: jacketed loads they list a max based on SAAMI; cast they make up an imaginary low ceiling supposedly to avoid leading issues.

  3. #3
    Boolit Grand Master tazman's Avatar
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    OK. You are on your own.

  4. #4
    Boolit Master brewer12345's Avatar
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    Quote Originally Posted by tazman View Post
    You asked for a mid range load. I would consider those to be mid range loads.
    What velocities are you looking for?
    Touche. I guess I got on the Unique bandwagon and was really just wondering how much more I could safely bump the charge in the quest for accuracy. I guess my beef is easily illustrated by the Hodgdon data for HP38 with a 158 grain bullet. Max for a jacketed bullet is 6.9 grains at 40,000 CUP, Max for cast is 5 grains at 23,900 CUP. Clearly the cast load is not at the limits for the cartridge, while the jacketed data is. If I knew the limit for cast I would at least have an idea of how far I could go.

    I guess I will try HP38 and see where it leads. Velocity north of 1000 FPS with high accuracy is the idea.

  5. #5
    Boolit Master
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    13.5gr of 2400 will give good accuracy with that boolit 8.5gr true blue is good too

  6. #6
    Boolit Master
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    Lil Gun powder at 15grs. in my Rossi carbine is crazy accurate at 100 yards with the 358156 HP bullet. After I shot that load I quit experimenting and just loaded it in all my brass.

  7. #7
    Boolit Master
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    Quote Originally Posted by robg View Post
    13.5gr of 2400 will give good accuracy with that boolit 8.5gr true blue is good too
    +1 for 2400 13.5 gr.

  8. #8
    Boolit Master brewer12345's Avatar
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    Looking at the lyman manual.I was coming to the conclusion that 2400 was probably the answer last night. Will have to pick up a pound and play with it.

  9. #9
    Boolit Master
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    I thought the 358156 was a Ray Thompson design. Am I laboring under a misguided thought?

  10. #10
    Boolit Master Guesser's Avatar
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    Ahyup.....that 13.5/2400 works for all mine.

  11. #11
    Boolit Master scattershot's Avatar
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    Skeeter Skelton used that load almost exclusively in his .357s and heavy .38 Specials. He used .38 Special brass, and crimped the bullet in the lower groove. Claimed good accuracy, and about 1100 fps, if I remember correctly.
    "Experience is a series of non-fatal mistakes"


    Disarming is a mistake free people only get to make once...

  12. #12
    Boolit Grand Master
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    Quote Originally Posted by 44MAG#1 View Post
    I thought the 358156 was a Ray Thompson design. Am I laboring under a misguided thought?

    No , you're exactly correct. Ray Thompson created that one.

  13. #13
    Boolit Master brewer12345's Avatar
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    Yes, brain fart. Definitely the Thompson design. I cast them with a bunch of exrr tin added to.the coww alloy to.approximate lyman 2 and they are very pretty and shiny. Need to get them shooting well.

  14. #14
    Boolit Master
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    Lyman Cast Bullet Handbook ed 3 has lots of data for 358156 in 357 Magnum
    Hick: Iron sights!

  15. #15
    Boolit Master
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    That is a Ray Thompson design & Skeeter was very fond of it in 38 special brass with 13.5 grs of 2400. I load the same load in the bottom crimp groove or 14 grs in 357 magnum brass for fine accuracy. Use a good lube like LBT blue, or Carnuba Red or powder coat them like I do.
    These loads are for 357 magnum guns only, don't use in a 38 special.

    Dick

  16. #16
    Boolit Buddy Rainier's Avatar
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    Give the HP38 a wave. W231 - 6 to 7 grains works like a dream for midrange loads.
    "Truth is treason in the empire of lies" Ron Paul

  17. #17
    Boolit Grand Master Bazoo's Avatar
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  18. #18
    Boolit Master Jack Stanley's Avatar
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    For me Unique doesn't seem to do very well in mid-range loads for the .357 magnum . Much better results with 2400 .

    Jack
    Buy it cheap and stack it deep , you may need it !

    Black Rifles Matter

  19. #19
    Boolit Master
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    I've shot a lot of that boolit with 14 grains of 2400. Its not hot, but maybe hotter than you want. I never cared for 2400 in reduced loads, it doesn't burn well.

  20. #20
    Boolit Buddy
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    I use that bullet a lot. I really like it. 7 grains of Herco is what I use.

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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