125gr 357sig vs. 125gr 357 magnum?

This is a discussion on 125gr 357sig vs. 125gr 357 magnum? within the Defensive Ammunition & Ballistics forums, part of the Defensive Carry Discussions category; Is it true that the 125gr 357sig round offers the same performance as the 125gr 357 magnum round,when both are fired from a 4" barrel? ...

Page 1 of 2 12 LastLast
Results 1 to 15 of 26
Like Tree34Likes

Thread: 125gr 357sig vs. 125gr 357 magnum?

  1. #1
    Senior Member Array 1911luver's Avatar
    Join Date
    Mar 2006
    Location
    Florida
    Posts
    1,114

    125gr 357sig vs. 125gr 357 magnum?

    Is it true that the 125gr 357sig round offers the same performance as the 125gr 357 magnum round,when both are fired from a 4" barrel?

    I've read that the 357sig was developed specifically for this purpose,but does it measure up in real world use? Does it really offer "magnum performance in an auto pistol"?
    Snub nose revolvers,the original concealed carry guns.

  2. #2
    Distinguished Member
    Array Blue Thunder's Avatar
    Join Date
    Aug 2009
    Location
    Retired In the Gun Room
    Posts
    1,217
    The .357Sig loaded with a 125Gr Bullet will go at 1500 FPS and have 619Ft. Lbs of energy.
    The .357 Magnum loaded with a 125Gr Bullet is 1600 FPS and have 710Ft. Lbs of energy.
    Not much difference except it is harder to get Social Ammo for the .357Sig these days and the bullet is a 9MM (.355) and the .357Magnum is .357 diameter.
    Rhinoman likes this.
    If only LIFE could be a little more tender and ART a little more robust. Alan Rickman
    Praise the Lord my Rock, who trains my hands for war, my fingers for battle --- Psalm 144
    NRA Endowment Life
    There are NO Silver Medals for Street Combat
    Blue Thunder, I smell Victory in the Morning!

  3. #3
    Senior Moderator
    Array gasmitty's Avatar
    Join Date
    Jun 2007
    Location
    Gilbert, AZ
    Posts
    14,263
    At "social encounter" distances, the 91 foot-pounds of difference in energy will make very little practical difference in the outcome.

    Does it really offer "magnum performance in an auto pistol"?
    I just looked at data for .357 mag, .357 Sig and 10mm from Federal, Hornady and Winchester. In the JHP loadings closest to 125 grains, in muzzle energy alone the .357 is tops for Fed and Hornady. In the Winchester line, the 10mm auto shows 10% higher ME than the .357 mag. .357 Sig is at the bottom of the three in the Hornady and Win loadings. Realistically, not a huge difference among the three with respect to external ballistics.
    Recon1342 likes this.
    Smitty
    AZCDL Life Member
    NRA Patron Member
    NROI Chief Range Officer

  4. #4
    Senior Member Array Keltyke's Avatar
    Join Date
    Jun 2009
    Location
    Spartanburg, SC
    Posts
    785
    If I carried a .357 mag., I'd use all that power to throw a heavier bullet than a 125.

  5. #5
    Senior Moderator
    Array gasmitty's Avatar
    Join Date
    Jun 2007
    Location
    Gilbert, AZ
    Posts
    14,263
    Quote Originally Posted by Keltyke View Post
    If I carried a .357 mag., I'd use all that power to throw a heavier bullet than a 125.
    The 158 grain JHP and soft-point loads were found to over-penetrate humans... the 125 gr JHPs are probably the best stopper out there.

    But if you need to shoot through tough barriers like sheet metal, I'd sure give the nod to the heavies.
    flintlock62 and Recon1342 like this.
    Smitty
    AZCDL Life Member
    NRA Patron Member
    NROI Chief Range Officer

  6. #6
    VIP Member Array Guantes's Avatar
    Join Date
    May 2010
    Location
    Idaho
    Posts
    5,267
    The 145gr Silvertips have found favor with a number of people.
    awoodpd13 likes this.

  7. #7
    Member Array Sgt Z Squad's Avatar
    Join Date
    Aug 2009
    Location
    Democratic Socialist Connecticut
    Posts
    120
    Take a look here for information: Pete's .357 Sig.
    Certifed Sig Classic Pistol Armorer
    USMC: 1975-1979
    Lawdog: 1980 to ???
    Soldier of Christ: January 2000 to Eternity
    A Sheepdog who has found the Shepherd
    Romans 5:8

  8. #8
    Member Array Sgt Z Squad's Avatar
    Join Date
    Aug 2009
    Location
    Democratic Socialist Connecticut
    Posts
    120
    Quote Originally Posted by Blue Thunder View Post
    The .357 Magnum loaded with a 125Gr Bullet is 1600 FPS and have 710Ft. Lbs of energy.
    I have seen most of the factory loaded 125 gr ammo is between 1200 and 1500 FPS, except for Buffalo Bore which is 1700 FPS and Double Tap at 1600 FPS. Speer Gold Dots is 1450 FPS is the velocity that the .357 Sig was suppose to mirror.
    Certifed Sig Classic Pistol Armorer
    USMC: 1975-1979
    Lawdog: 1980 to ???
    Soldier of Christ: January 2000 to Eternity
    A Sheepdog who has found the Shepherd
    Romans 5:8

  9. #9
    VIP Member Array OldVet's Avatar
    Join Date
    Nov 2009
    Location
    Hiding inside a bottle of Jim Beam Black in S. FL.
    Posts
    22,760
    Sticking with 125 grn bullets, the difference in power is so slight no BG will know the difference. The actual velocities of either probably aren't going to match "advertised" specs due to different barrels used and other conditions. Use them only as a basic guideline, not gospel.

    The advantage with the .357 SIG round is the increase in capacity. If you want to change bullet weights, then the comparisons fall through.

    I think that those who claim the SIG ammo isn't available simply aren't looking. It's there. The choices in bullets is limited though. Prices are comparable in both calibers.

    Wouldn't it have been great if the .357 SIG actually used a .357 bullet? Think of the reloading possibilities available then. There's a wildcat round begging for testing.
    Recon1342 and Rhinoman like this.
    Retired USAF E-8. Official forum curmudgeon.
    Lighten up and enjoy life because:
    Paranoia strikes deep, into your life it will creep. It starts when you're always afraid... Buffalo Springfield - For What It's Worth

  10. #10
    Member
    Array Slice11's Avatar
    Join Date
    Dec 2014
    Location
    Cary, NC
    Posts
    479
    Yeah, I know....6 year old thread...
    I haven't bought a firearm in about 6 months and this itch is aggravating.

    The only hole in our stable is more BUG choices that could be primaries when needed, so...

    SP101 .357 Magnum or Glock G32 .357 Sig?

    Hmm....
    Recon1342 likes this.
    If you can't write your idea on the back of a matchbook cover, you don't have a clear idea - unknown
    Never mistake activity for achievement - John Wooden

  11. #11
    Senior Member Array Danimal's Avatar
    Join Date
    Jun 2008
    Location
    Kansas City
    Posts
    937
    I've got both. My vote would be for the G32. Higher capacity, plus with barrel swaps you can shoot .40, and with a mag and barrel swap can shoot 9mm.

    357sig is hard to come by, but I reload for it, and used 357sig brass is dirt cheap.

  12. #12
    VIP Member Array subhuman's Avatar
    Join Date
    Mar 2014
    Location
    alabama
    Posts
    2,073
    the SP101 is a great 5 shot carry gun.
    the 13 shot G32 is a superb carry gun in Glocks favorite frame size
    taste is all up to you, either loaded with a high quality HP and backed by the owners ability to put the bullet where it needs to be will get the job done
    If it needs to be done, do it.
    Diligentia,Vis,Celeritas

  13. #13
    VIP Member Array glockman10mm's Avatar
    Join Date
    Jan 2010
    Location
    Central Kentucky
    Posts
    12,004
    I prefer the bullet profile of the revolver over the auto loader. The Sig has more of a 9mm cone type bullet for feeding, and the revolver round can be loaded with those more blunt soft tipped lead half jacketed bullets that use to leave lead and copper shrapnel thru out the body creating terrible damage.

    I doubt in the real world one would notice much difference in effect.
    Recon1342 likes this.
    " Blessed is that man, who when facing death, thinks only of his front sight"
    -Jeff Cooper

  14. #14
    Member
    Array Slice11's Avatar
    Join Date
    Dec 2014
    Location
    Cary, NC
    Posts
    479
    Thanks for the responses.

    I prefer "both/and" over "either/or" anyway...
    I already stock .357 Mag, so the SP101 is an easy choice. I already have holsters to fit a G32 and I'm intrigued by the .357 Sig.
    Asking the question in a room full of enablers was predictable.

    I think I'll get the SP101 first, then the G32.
    If you can't write your idea on the back of a matchbook cover, you don't have a clear idea - unknown
    Never mistake activity for achievement - John Wooden

  15. #15
    VIP Member Array subhuman's Avatar
    Join Date
    Mar 2014
    Location
    alabama
    Posts
    2,073
    I'm thinking about a .357 Sig barrel....just because, you know? lol
    If it needs to be done, do it.
    Diligentia,Vis,Celeritas

Page 1 of 2 12 LastLast

Remove Ads

Sponsored Links

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Similar Threads

  1. Hornady 125gr XTP?
    By Cody in forum Defensive Ammunition & Ballistics
    Replies: 10
    Last Post: June 4th, 2013, 09:55 PM
  2. Corbon 125gr +p ?
    By hihosilver in forum Defensive Ammunition & Ballistics
    Replies: 7
    Last Post: May 25th, 2010, 03:04 PM
  3. 357 125gr. jsn vs. 158gr. fmj
    By Bart in forum Defensive Ammunition & Ballistics
    Replies: 17
    Last Post: May 22nd, 2009, 01:59 AM
  4. 124 gr +P 9mm GD = .357 mag. GS 125gr. Ballistics?
    By sigbear in forum Defensive Ammunition & Ballistics
    Replies: 8
    Last Post: August 24th, 2008, 06:56 PM
  5. Double Tap .357 125gr. in a snubbie
    By Marvin Knox in forum Defensive Ammunition & Ballistics
    Replies: 6
    Last Post: July 9th, 2008, 07:17 PM

Search tags for this page

.357 magnum vs .357 sig
,

.357 sig vs .357 magnum

,
.357 sig vs. .357 magnum
,

357 magnum vs 357 sig

,
357 sig ammo vs 357 mag
,
357 sig versus 357 magnum
,
357 sig vs 357 mag
,
357 sig vs 357 mag ballistics
,

357 sig vs 357 magnum

,

357 sig vs 357 magnum ballistics

,
357 sig vs magnum
,
sig 357 vs 357 magnum
Click on a term to search for related topics.