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Thread: Another Odd Case

  1. #1
    Boolit Master

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    Another Odd Case

    As a brass rat, I find some odd stuff but this is a first. A 357 Sig, with a Sig head stamp, fired in a 40 S&W. I guess the extractor held it tight enough for the firing pin to strike the primer? They were shooting off of a bridge into the water so I doubt they even noticed the poor accuracy. One more case to add to my oddity shelf!

  2. #2
    Boolit Master
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    I've got a .300 Win Mag that looks like it was fired in a .300 Weatherby Mag. Got the double radius nicely formed.
    The only amendment the Democrats support is the 5th.

  3. #3
    Boolit Master MOA's Avatar
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    Isn't the 357 sig just a 40 s&w with a bottleneck to hold the smaller round? I imagine the round kinda moved around a bit going down the pipe. :-O
    Well, in reality its a shortened 10mm auto case, and what is kinda strange is the sig is .23mm longer in case length and these all headspace on the case mouth. They may not have noticed the loss in accuracy, but must have felt the recoil difference. The sig is a higher pressure round than the 40.
    Last edited by MOA; 08-26-2018 at 10:11 AM.

  4. #4
    Boolit Master Texas by God's Avatar
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    The recoil of the .357 Sig fired in the .40 S&W would be anemic due to fleeting contact with the barrel. As far as the extractor holding the case for ignition? Yes it can. Witness the Astra 1921/400 firing several shorter 9mm cartridges and I've shot a m40 Glock 10mm reliably with .40 S&W.

  5. #5
    Boolit Master

    nicholst55's Avatar
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    Quote Originally Posted by MOA View Post
    Isn't the 357 sig just a 40 s&w with a bottleneck to hold the smaller round? I imagine the round kinda moved around a bit going down the pipe. :-O
    Well, in reality its a shortened 10mm auto case, and what is kinda strange is the sig is .23mm longer in case length and these all headspace on the case mouth. They may not have noticed the loss in accuracy, but must have felt the recoil difference. The sig is a higher pressure round than the 40.
    The .357 Sig case is slightly longer than a .40 S&W but shorter than a 10mm.
    Boycott YouTube

  6. #6
    Boolit Bub
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    On too many occasions, I have found 9mm fires in 40s. I can’t say I have ever found a .357Sig fires in one though!

  7. #7
    Boolit Master Remmy4477's Avatar
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    This summer we found about 25 rounds of .380acp that appears to have been fired in a 9mm.
    Talk about funny looking brass!

    My budy has fired a few sigs in his .40 glock a few times, Only because we were messing with different barrels and got one mag mixed up!

  8. #8
    Boolit Master TNsailorman's Avatar
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    At the range years ago when the .308 Winchester was a fairly new round, I found a case stamped with 308 markings but clearly had been fired in a rifle chambered with a 30-06 sized case. Can you say—-cylinder case. james

  9. #9
    Boolit Master

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    Yeah, I have some 308 cases fired in '06 chambers. I also have the usual collection of Remington or Winchester belted magnum cases fired in Weatherby chambers. I save all of these oddities just to show others. I have a few 270's fired in '06 chambers. One can only guess they were fired in an action with controlled feed and the extractor was strong enough to hold the case tight agains the bolt face.

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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