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Thread: Proposing "6.35x26mmSR / .25 Magnum Auto. Colt Pistol" cartridge:

  1. #21
    Boolit Master



    Join Date
    Apr 2007
    Location
    Alturas, California...where the west still lives!
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    2,013
    I find this project fascinating. I can't contribute much, except a story related to me by my police officer father back in the late fifties.......

    He and his partner were called to the scene of a shooting in the tenement area of our city. When they arrived, they found an overturned table, the floor littered with playing cards and money. There was a huge man laying in the corner....dead....with a large hole in his chest and beside him on the floor was a Colt Junior .25 automatic.

    The other individual was a tiny, meek looking man still sitting in a chair. He had a .25 caliber hole in his shoulder and he still clutched a large caliber muzzle loading percussion pistol. After disarming him and summoning the coroner, my father asked him why he carried such a huge, antiquated pistol. His answer was classic....."Them lil' guns just gets you into trouble. These big ones gets you out...."

  2. #22
    Boolit Master
    Chev. William's Avatar
    Join Date
    Aug 2013
    Location
    Sun Valley, California
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    1,529
    Intriguing Story.
    I wonder What Caliber the Percussion "Large caliber . . . Pistol" was.

    Best Regards,
    Chev. William
    Last edited by Chev. William; 08-17-2017 at 03:55 PM.

  3. #23
    Boolit Master
    Chev. William's Avatar
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    Aug 2013
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    Sun Valley, California
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    I bought a New Lee Universal Expander Die and Set About Modifing It for a Dedicated Expander die for my 5.7x28mm case reforming process.

    Just Tried out my New Lee "Universal Expander" Die with the Small Cartridge Expander stem Turned To .250" diameter. Outstanding results! The Die / Stem expands the Neck/Shoulder of 5.7x28 Cases Enough so the Swaging Process Removes the Felt evidence of The Prior Neck and Shoulder Junctions. My Prior Expander was a .2500" Drill Blank machined With a tapered end and Chucked in my Bench Drill Press for Use. It left a Slight Felt difference in diameters in the Area of the Neck and Shoulder Joints in my Swaged cases.

    Very Happy with this new Modified Expander and Die!

    Best Regards,
    Chev. William

  4. #24
    Boolit Master
    Chev. William's Avatar
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    Aug 2013
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    Sun Valley, California
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    This December 20th I placed an Order with JGS Precision for the third custom Finish Chamber reamer in my current .2795" body diameter Series, the ".25MACP WS #3" which is planned to allow firing of cases up to 1.056" in length.

    This Cartridge is listed as "6.35x24mmSR" or ".25 Magnum Auto" on 'Ammoguide Interactive" Website's Cartridge Master Data Base.

    best Regards,
    Chev. William

  5. #25
    Boolit Master
    Chev. William's Avatar
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    Aug 2013
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    The "Ammoguide Interactive" Cartridge number 971 is diagrammed with the 1.024" case length but I have been trimming the 'Wildcat' Cases to 1.055" to mimic .22WMR case length.
    The A.I. drawing is included below:

    Note that the listed Cartridge max length is 1.260" or .236" over the case length.

    The .22WMR A.I. Drawing is included below:

    Note that the listed Cartridge max length is 1.350" or .295" over the case length.

    Chev. William

  6. #26
    Boolit Master
    Chev. William's Avatar
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    I am in the Process of changing my Case Forming Process Slightly by adding a .277" ID Hardened (Rc61) Alloy Steel Drill bushing as A last 'forming' step to remove the small tapered section of the base to avoid turning the case base to remove this tapered section.

    A Pilot Drilled PT&G Blank Die body is about $20.00; the Drill Bushing is about $9.00 From "McMaster-Carr".
    I will need to use a Lathe to turn the ID of the Blank die to hold the Bushing and to thread the Top inside, probably in 1/2-20 UNF threads; as that gives .050 advance per turn of rotation, making fine adjustments of the accessories easier and Providing clearance for the body of my 'Extraction Punch'.

    Also, my terminology for this cartridge design has Evolved and it is now contracted for 'short hand references' As: ".25MACP".
    Chev. William

  7. #27
    Boolit Master
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    The Experimental .277" Drill Bushing based 'Shearing' Die has been completed with a PT&G die body which i bored 3/8" through; drilled the top 7/16"x1-1/2" deep and then 15/16" x1-12" deep followed by tapping 1/2-20UNF to nearly 1-1/2" of Full Threads (via Taper, Plug, and Bottoming taps); followed by machining the bottom end to take a press fitted 1/2"ODx1/2"L Drill bushing. The bushing is pressed into place then the Edge of the 'socket hole' is swaged over to retain the drill bushing against case extraction forces (Extraction is by Punch and Hammer).

    It works Great!

    Now my Formed cases will be .277" for full body Length.
    Chev. William

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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