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357 SIG barrel

Discussion in 'Reloading' started by Snapper2, Nov 28, 2012.

  1. Snapper2

    Snapper2

    2,413
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    Feb 22, 2008
    s.east Texas
    I just bought a stormlake 357sig barrel for my g23. I received some 124xtp and starline brass to load for it today. I've been reforming 40sw brass till I got the sig brass. Today I tried to measure the free bore between the shoulder and rifling and couldnt do it.:steamed: I loaded a 147 gold dot dummy round as long as I could(1.330) without touching the rifling. How much is too much? The barrel shoots fine and is accurate.:dunno:
     
  2. Snapper2

    Snapper2

    2,413
    5
    Feb 22, 2008
    s.east Texas
    OK, I just measured with a different bullet(147gr xtp) and it starts touching at 1.300. Not as bad as I first thought .160 space for a bullet loaded at a OAL of 1.140.
     

  3. yellowhand

    yellowhand

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    Feb 1, 2012
    Arizona
    Question for you.
    I shoot a lot of 357Sig, my carry round 90% of the time.
    Always read where neck down 40 SW to 357 Sig was a big no no.
    I've formed the 40SW brass to 357Sig and the formed brass came up a tad short.
    Never loaded any though.
    Have you shot 40SW brass necked to 357 Sig and what were the results?
    357 sig brass is cheap, once fired, but might need to run necked down 40SW to 357 Sig in an ,,,,,
     
  4. Snapper2

    Snapper2

    2,413
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    Feb 22, 2008
    s.east Texas
    Yellowhand, this is my first attempt at reloading 357sig. I do have some experience with 400 corbon which also headspaces off the shoulder. I reformed around 25 fired federal 40sw cases with a lee 357sig die and used 5gr universal with 147gr xtps. Which were real accurate "mouse fart" rounds compared to the factory winchester 125gr fmj I fired with them. I did read where the sig brass is stronger that the 40. I also had a "misfire" or squib or something happened where the factory bullet got jammed into the lead. I'm beginning to think the "bullet free space" leading to the rifling allowed this to happen. But to answer your question,,,,,no problem with my reloaded/formed fired 40sw brass.
     
  5. dkf

    dkf

    5,474
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    Aug 6, 2010
    If the barrel shoots fine I would not worry about it. You are limited by what will fit in the magazine. The test loads I have loaded to 1.150" OAL did not function the greatest so I stick to the max of 1.140" OAL.

    As far as .40 brass necked to .357sig. SAAMI says it headspaces off the mouth. So then in theory (if that is true) if you use shorter necked .40 brass you will be depending on the extractor to hold the round in the case. The necked down .40 brass I tried in my Glock barrel stops at the same place as the proper length .357sig brass so it is obviously resting on the shoulder not the case mouth.

    RP .357sig brass = .860" long
    RP .40sw brass sized with Lee .357sig sizer = .845"

    Only .015" difference but the necked .40 brass is .010" under SAAMI minimum brass OAL. Will it work, yep. Is it ideal, nope.

    It ain't the 90s anymore .357sig brass is available for the same price as .40sw. So I use .357sig brass. Just don't expect to find range pickup .357sig. The place I shoot has brass scroungers out the yin yang. If there is 75 pcs of .40sw brass on the ground I hit the mother load.
     
    Last edited: Nov 28, 2012
  6. yellowhand

    yellowhand

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    Feb 1, 2012
    Arizona
  7. dkf

    dkf

    5,474
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    Aug 6, 2010
    Precision Delta has .357sig brass for $40 shipped per 1000. Never ordered any brass from them though.
     
  8. Snapper2

    Snapper2

    2,413
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    Feb 22, 2008
    s.east Texas
    Thanks, I feel a little better about my barrel now.I'll call Stormlake tomorrow to make sure though. If a shorter 124gr bullet gets slammed forward and has "reverse setback" it might lose too much pressure and not make out of the barrel with a light load. I'll feel better knowing for sure about the bullet "free space". As for as the 40brass. 2 things. Its suppose to be weaker. And the shorter neck gives less neck tension on the bullet. So I'll agree.
     
    Last edited: Nov 28, 2012
  9. Snapper2

    Snapper2

    2,413
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    Feb 22, 2008
    s.east Texas
    I appreciate the websites for brass guys.:cool:
     
  10. Snapper2

    Snapper2

    2,413
    5
    Feb 22, 2008
    s.east Texas
  11. yellowhand

    yellowhand

    244
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    Feb 1, 2012
    Arizona
    I've had good results with 10 grains of Bluedot, and Remington 124 grain HP's.
    Loud is an understatement out of my Glock 32C and almost as bad out of a 22 with a LW conversion barrel.
    1360 avg in the 32C and 1400 avg in the converted 22

    http://www.evergladesammo.com/bullets/handgun-bullets/montana-gold-357-sig-125gr-jhp-bullets.html

    Just got the above, have run up a couple hundred, but not tested them yet, seem to hold tight, banged on the nose pretty hard looking for set back, nada, using a factory crimp lee die.
     
  12. yellowhand

    yellowhand

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    Feb 1, 2012
    Arizona
    No worry, would never even try it unless I was facing placing small rocks down a forty five LC case:supergrin:
    I'd always read where you COULD'NT do it, but suspected those folks had never tried it.
    Kinda like using 40 mags with 9mm.
    Did it by mistake, old eyes, those darn black mags all look alike.
    After shooting four full mags without an issue, noticed they were forty mags in my glock 19.
     
  13. fredj338

    fredj338

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    Why it should NOT be done. The neck is already too short. Using 40 brass means even less neck tension. When the 357sig first came out, nay relaoders did exactly that, used pelntiful 40 cases to make 357sig. Why though, 357sig brass is quite cheap bought as once fired.:dunno:
     
    Last edited: Nov 29, 2012
  14. Snapper2

    Snapper2

    2,413
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    Feb 22, 2008
    s.east Texas
    So far all I've used are 147gr for reloads. I reloaded the winchester factory brass(357sig) I shot with 800x at max load data and it was loud and stout also. It measures poorly but seems to be more forgiving. Universal was accurate and softer shooting than 9mm target ammo. I might give Blue Dot a try.
     
  15. fredj338

    fredj338

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    so.cal.
    BD works, but real flashy & loud. I like LOngshot or AA#7 for all bullets weights. AA#9 has a huge following too, takes a lot of powder to get the vel up but it is accurate.
     
  16. Snapper2

    Snapper2

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    Feb 22, 2008
    s.east Texas
    I dont think that I can honestly say thats never happened to me, even when I had younger eyes.:embarassed:
     
  17. yellowhand

    yellowhand

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    Feb 1, 2012
    Arizona
    Fred, agree with ya.
    Ask if it had been done, if it could be done, stated above I'd not try it unless in an emergency, and if I ever run out of ammo, the world would in fact be ending:rofl:.
    Just wondering, if it would work.
    Been looking for more sources/brands of bullets that have the correct neck tension, love 357 sig, but it is sensitive to case neck tension/set back.
     
  18. fredj338

    fredj338

    22,682
    1,452
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    so.cal.
    FWIW, I have tried a couple diff 9mm bbls w/ the G23 or G32. If you do NOT use 9mm mags, reliability is suspect, at least for me. So I only use 9mm mags w/ my conv bbls in the G32. A bit of white paint in the stamped 9mm marking makes sure I get the right mag.:wavey:
     
  19. Snapper2

    Snapper2

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    Feb 22, 2008
    s.east Texas
    The things I've always heard about BD kept me away from it. I do have all the others you mentioned. :cool:
     
  20. yellowhand

    yellowhand

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    Feb 1, 2012
    Arizona
    One of our real old guys:tongueout: told me to just shove 10 grains of Bluedot into the case and fire for effect with a 124/125 JHP.
    When I first started reloading 357 sig about a year ago.
    Checked the books and it appeared ok.
    Loaded up a few hundred and went to the range.
    Loud, but very accurate, flat shooting, and no pressure signs with CCI sm standards.
    Then I read all of the comments about BD, etc.
    10 grains of BD has not been a cause of concern to me.
    Plenty fast for me too, did I metion loud?:crying: