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357 sig

Discussion in 'Reloading' started by rickyp, Oct 18, 2012.

  1. rickyp

    rickyp

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    Can you form 357 sig from 10 mm brass I was thingking about the 40 S$W but I read that the 357 sig is a little linger then the 40.

    I was wondering if I could just run the 10 mm brass into a RCBS trim die and then trim off the extra. then run it into a normal sizing die then be done with it.
     
  2. michael e

    michael e

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    I have with 40SW brass, I wouldn't waste my 10mm brass trying.
    Check out LEOBRASS.com for once fired 357sig brass .
     

  3. dkf

    dkf

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    Probably would work but kinda waste really. The 10mm brass is large primer so I would assume the load would have to be adjusted accordingly. If you don't need the 10mm brass just sell it off or trade it off on some .357sig brass. The 10mm brass is often worth more.
     
    Last edited: Oct 18, 2012
  4. RedHaze

    RedHaze Handgunner

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    [​IMG]
    .357 SIG on left, resized .40SW on right.

    Don't bother with 10mm brass. The .40SW works just fine for mild target loads.
    Only brass I've ever used for full bore .357 SIG loads was new Starline brass...
     
  5. sellersm

    sellersm disciplinare

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    +1 to Starline brass for full loads!
     
  6. rickyp

    rickyp

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    Redhaze, the neck looks considibale shorter then the sig round. how is the neck tension?
    also has anyone loaded the 9 mm 115 grbullets in the 357 sig?
     
  7. PrecisionRifleman

    PrecisionRifleman

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  8. PrecisionRifleman

    PrecisionRifleman

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    +2! I have 1000ct of 40S&W waiting to be loaded up.
     
  9. rickyp

    rickyp

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    No ot what question?
     
  10. dkf

    dkf

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    You lose neck tension with the shorter case but with the righ tbullet it is doable. I use .357sig brass myself but have necked down .40 brass already.

    You can use 115gr bullets in the sig if the profile is correct. I have loaded 90gr bullets in sig already. They are fun on steel.
     
  11. shotgunred

    shotgunred local trouble maker

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    What bullets (brand , weight , etc) are good for reloading the 357 sig?
     
  12. michael e

    michael e

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    With some bullets it works. Have had a coupe that couldn't get to work. Not in room with notebook to see what worked vs didn't.
     
  13. dkf

    dkf

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    Basically any bullet with a profile similar to the Hornady XTPs. You have to have enough straight section on the bullet so you can seat it deep enough to get the proper OAL. Do to the small shoulder you you lose neck tension quick with the wrong profile.

    The 90gr, 115gr, 124gr, 147gr XTPs all work well. Nosler 90, 115, 124 JHP. PD 124gr JHP, HAP 121gr, 125gr, Montana Gold 115gr, 124 JHP, sig fmj and the list goes on and on. IMO Remington has one of the worst lineup of bullets as far as working for the sig. Driving band on the base, wrong profile and etc. Only bullet that is any good is the Golden Sabre Bonded bullet that is made specifically for the .357sig factory ammo. They do not even sell it to the reloader. I bought some UMC factory .357sig ammo and a couple of the rounds were setback out of the box, wrong profile bullet.
     
    Last edited: Oct 23, 2012
  14. Uncle Don

    Uncle Don Wood butcher

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    Being assocated with LE, I'm fortunate to have a never ending supply of 40S&W. As a .357 shooter, almost all of my brass begins life that way.

    So far, I've never had an issue with neck tension or setback symptoms in approx 6k rounds fired. I'll admit though, that I don't load them at full power, but still with more smoke than a 9. If I'm going to go full tilt, I'll use actual Sig brass.
     
  15. fredj338

    fredj338

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    I don't see th point?
    1st, the 10mm is LP brass.
    2nd, 10mm brass is expensive compared to 357sig.
    Necking down a 40 case would work, but the case will be shorter & I understand slightly thinner in the head area, nether is good. Just buy once fired stuff, it's pretty cheap & ready to reload.
    Bullets are really important, yo ucan;t use just any 9mm & get good results.
     
    Last edited: Oct 29, 2012