357 sig conversion barrel

Discussion in 'Handguns: Autoloaders' started by Billboard, Jun 12, 2021.

  1. Billboard

    Billboard Member

    Joined:
    Feb 26, 2021
    Messages:
    24
    I have a FNX 40 sw. And found out i could just buy a convesion barrel for 357 sig. So i ordered a new .357 sig barrel. Im told thats all thats needed to shoot. The magazine says it hold the sig bullet also. I ordered it about 6 months ago. Well to my surprise it came 3 days ago. Since the FNX 40 barrel is black i got a Chrome sig barrel just so id know what its shooting at the time. Safety first right? I bought it from EFK Fire Dragon. Very nice looking barrel. So i broke the FNX down and put the new barrel in. Fits like glove, It slid right in. A perfect fit if you ask me. Now its time to buy a box of .357 sig bullets and ill also reload 50 or so and check it out. I made a few dummy rounds and they cycle thru nice n smooth. I like it. I hope it fires as good as it looks. Has anyone bought a conversion barrel and how'd it work?
     

    Attached Files:

    barnetmill, Walkalong and WrongHanded like this.
  2. WrongHanded
    • Contributing Member

    WrongHanded Contributing Member

    Joined:
    Jul 6, 2017
    Messages:
    2,643
    Ammo may prove hard to find right now, but reloading .357 Sig isn't all that hard.

    Congrats on trying a new cartridge!
     
  3. Billboard

    Billboard Member

    Joined:
    Feb 26, 2021
    Messages:
    24
    Yeah your right ammo is scarce. I found a few boxes and definitely over priced for 20 rounds. I have all the necessary components to load the .357 sig. I am excited to shoot it.
     
    wayne in boca and WrongHanded like this.
  4. Murphster

    Murphster Member

    Joined:
    Jan 30, 2003
    Messages:
    548
    I’ve done the 357/40 barrel swap with Sigs and Glocks. Never a problem. Flawless functioning in both. Point of impact may be different.
     
  5. kcofohio
    • Contributing Member

    kcofohio Contributing Member

    Joined:
    Dec 16, 2013
    Messages:
    4,486
    Location:
    NW Ohio
    The things to know about 357 SIG reloading is, it takes .355" bullets, but not all .355" bullets will work with the 357. There isn't a whole lot of neck. I don't know or any round nose bullets that will work. Check with reloading manuals for what bullets they use. :)
     
    Tom-R2, Billboard and JimKirk like this.
  6. Flatbush Harry

    Flatbush Harry Member

    Joined:
    Mar 31, 2008
    Messages:
    1,017
    Location:
    Colorado
    I have an EFK Fire Dragon barrel for mySpringer XD40sc...it works perfectly and shoots accurately with Sig ammo. I also have .357 Sig barrels for my Glock 27, my Springer XD40 Service and my Sig P229 in .40 S&W, though the Glock has a G33 OEM barrel and theSig P229 has a Sig OEM .357 Sig barrel. All work perfectly. As the .357 Sig is a necked-down .40 S&W, successful operation should be expected. As the .357 Sig is basically a .357 Mag, you can expect more recoil, more muzzle flash, and a different point of impact than a .40 S&W.

    Harry
     
    Billboard likes this.
  7. tommy.duncan

    tommy.duncan Member

    Joined:
    Aug 30, 2013
    Messages:
    874
    Location:
    Northern Virginia
    Can I get a link??
    I would be all over a 357sig barrel for an FNS!!
    I have several Sig P series pistols in 357sig and I would love to expand!! It is a great round!!
     
  8. mokin

    mokin Member

    Joined:
    Jan 13, 2007
    Messages:
    2,142
    Location:
    Western Colorado
    I've got a Bar-Sto barrel for my Glock 29 chambered for 357 SIG. I had to spend a little time with a stone to get it to fit but it works great. I really like the cartridge too.
     
    wayne in boca likes this.
  9. Patocazador

    Patocazador Member

    Joined:
    Jul 8, 2012
    Messages:
    5,059
    Location:
    Central Florida
    I did it the other way around. I bought a Sig 39 in .357 Sig and then got a factory .40 barrel from Midway on sale.
     
    Walkalong likes this.
  10. TTv2

    TTv2 Member

    Joined:
    Mar 31, 2016
    Messages:
    3,036
    For all the talk about how .40 is dead, it's really .357 Sig that is.
     
  11. Walkalong

    Walkalong Moderator Staff Member

    Joined:
    Nov 20, 2006
    Messages:
    68,065
    Location:
    Alabama
    I bought a Firedragon 9MM conversion barrel for a subcompact XD, worked great.
    XD SC & EFK 9MM Conversion Barrel.JPG

    I have an FNS-40, and have considered getting a conversion barrel for it.
     
  12. Walkalong

    Walkalong Moderator Staff Member

    Joined:
    Nov 20, 2006
    Messages:
    68,065
    Location:
    Alabama
    tommy.duncan likes this.
  13. dodo bird

    dodo bird Member

    Joined:
    Dec 23, 2010
    Messages:
    617
    31D83D45-3C4D-43E0-99A6-7C0A00D28648.png

    357 sig is great. Gonna get one someday.
     
    Last edited: Jun 13, 2021
  14. JimKirk

    JimKirk Member

    Joined:
    Nov 23, 2008
    Messages:
    3,377
    Location:
    Nicholls,GA South Georgia
    If you are reloading 357SIG ...make sure you use a bullet that has the right profile ...short nose fat long body ...the 124 grain XTP .355" is a very good style for 357 SIG ... there are several bullets that work ...the hard part is finding them.
     
  15. Billboard

    Billboard Member

    Joined:
    Feb 26, 2021
    Messages:
    24
    Thanks guys for the bullet info. I had read that i would need a longer neck bullet. While i was waiting for the barrel i went shopping for Dies i got a set of RCBS Dies, I got 1000 shells powder and primers i had. The bullets were the hardest to find. Only bought a box or two at a time but i finally got around a 1000. But i stayed with mostly .355 HP 124 gr bullets and .355 TFP 124 to 125 gr. bullets for the longer neck. I know i got a couple boxes of that Sig Crown V Bullet. Hope those work. I want the LFCD but i cant find one to buy. Primers O, boy dont get me started on those, im just lucky i have a few boxes of primers and after seeing the price gouging on 9mm i sold my 9 and im taking apart all my bullets to reuse the primers. Powder i have. The worst part of this project is 2 months ago i broke my back and now i have to wait longer. I cant get to my CC ( comand center ) to load. Its in the basement. Couple more weeks i can start. I have TiteGroup, Bullseye, Accurate #2 & #7 and Universal Powders. Which one would be reccomended first?

    Chris
     
    kcofohio likes this.
  16. CDW4ME

    CDW4ME Member

    Joined:
    Mar 15, 2009
    Messages:
    2,143
    Location:
    FL USA
    Agree.
    40 S&W 180 gr. tends to impact higher than 357 Sig 125 gr. - this difference may be helpful for POA/POI discrepancies.
    Glock 35 with 357 Sig barrel - has XS Big Dots - POI with 180 gr. 40 S&W a bit high for my liking, 357 Sig hits lower, my POA.
    Glock 35 with 357 Sig Barrel
    125 Gold Dot @ 1,399 fps / 543# KE
    125 HST @ 1,415 fps / 556# KE
    125 Ranger T @ 1,428 fps / 566# KE
    125 PPU FPJ @ 1,461 fps / 593# KE
    Glock35Sig.jpg
     
    kcofohio likes this.
  17. barnetmill

    barnetmill Member

    Joined:
    Jun 6, 2006
    Messages:
    1,122
    In glocks for the 40s and .357 the the barrels interchange quite well. The magazines are labeled as .357 or 40. I think the interchange well, but not absolutely sure of that. But for 9 into .40 guns it can be problematic without switching out other components. I am told that a 9mm conversion barrel into a glock 22 will work, I have not tried it.
     
  18. kcofohio
    • Contributing Member

    kcofohio Contributing Member

    Joined:
    Dec 16, 2013
    Messages:
    4,486
    Location:
    NW Ohio
    Load up some dummy rounds with your variety of bullets. Measure each cartridge and note length on the case. Let the gun's slide load the rounds one by one. Remeasure to see how much the length changed. I'm alarmed if I see more that .005" change in length. Generally I see .002-.003" change.

    As for powder, I haven't used any of your list in 357 SIG. But I'd try either Universal or #7.
     
  19. kcofohio
    • Contributing Member

    kcofohio Contributing Member

    Joined:
    Dec 16, 2013
    Messages:
    4,486
    Location:
    NW Ohio
    Screenshot_20210613-075531_Adobe Acrobat.jpg
    Screenshot_20210613-074313_Opera.jpg
     
  20. gnappi

    gnappi Member

    Joined:
    Jul 22, 2005
    Messages:
    330
    Location:
    South Florida
    Actually oddball calibers like .357 Sig and .38 super I am finding a lot of on empty store shelves.
     
  21. Billboard

    Billboard Member

    Joined:
    Feb 26, 2021
    Messages:
    24
    Im not a big tech guy but i did sign up for the Hornady and Speer Load Data App. They are nice. I was surprised to get a updated Hornady Load Manual. I wish Speer would send a new book. Having the paper load manuals are invaluable. I have a few Hornady, Barnes, Nosler, Speer, and some small generic ones. All good information. Ive been on the Hogden site many times. Ive tried buying powder when they said it was in stock but couldn't. Have you bought from the site or no? Just wondering why i cant.

    Chris
     
  22. Billboard

    Billboard Member

    Joined:
    Feb 26, 2021
    Messages:
    24
    They made a nice quality barrel. Just keep in mind that if its not in stock its like a 6 month wait. But if it is in stock it will ship out quick.
     
  23. JimKirk

    JimKirk Member

    Joined:
    Nov 23, 2008
    Messages:
    3,377
    Location:
    Nicholls,GA South Georgia
    AA#7 out the powders listed .... but something slower like AA#9 ... would be better ... Long shot works good for the faster end ....HS6 .... on the slow end AA#9 ...Enforcer .... AA 4100 ....

    If it were not for the bad metering ...800X works great ...

    The VCROWN bullets do good .... XTP are still my favorite
     
    Patocazador and kcofohio like this.
  24. Tom-R2

    Tom-R2 Member

    Joined:
    Apr 30, 2019
    Messages:
    59
    Location:
    Central Ohio
    I seldom carry my Glock 23c with the 40S&W barrel, I usually have the 357SIG barrel in. I found the Xtreme 135gr HP is a good bullet to reload, it's long enough to get a good neck seal. Their 135gr FP isn't a good fit. I mostly use 147gr load data. A while back I found a good deal on a SIG 226 in 40, I had a 357SIG barrel delivered before I got it to the range.
     
    kcofohio likes this.
  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice