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Thread: 7mm-30 Waters vs 7mm-30 Waters Improved

  1. #1
    Boolit Bub
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    7mm-30 Waters vs 7mm-30 Waters Improved

    When fire forming my .30-30 Winchester cases into 7-30 Waters I had a bit of a surprise. See the attached photo of a fired case vs a full-length resized cartridge. I suspect the rifle barrel for my Contender was re-chambered to an Improved cartridge without the barrel being re-stamped. Can anyone visually confirm this?

    My Cartridges of the World book seems to validate this based on the photos in the book.

    Second question. Assuming I am correct, will a standard 7-30 Waters neck-sizing die perform the same as an Improved neck-sizing die? All reloads will be in a single Contender barrel.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  2. #2
    Boolit Grand Master



    M-Tecs's Avatar
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    The neck looks to be to short for an AI.

    Some specs. here https://www.chuckhawks.com/7-30Waters_Imp.htm
    2nd Amendment of the U.S. Constitution. - "A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."

  3. #3
    Boolit Buddy
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    Looks like the 7mm cartridge that gary reeder made/touted for contenders.

  4. #4
    Boolit Grand Master



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    Quote Originally Posted by 3leggedturtle View Post
    Looks like the 7mm cartridge that gary reeder made/touted for contenders.
    I think you nailed it.

    http://forums.accuratereloading.com/...sl/print_topic

    https://www.reedercustomguns.com/inf...cartridges.htm
    2nd Amendment of the U.S. Constitution. - "A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."

  5. #5
    Boolit Bub
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    Lets go with the GNR assumption for a moment. How do you reload it? Where do you get the dies? If its a custom die set for $160+ I will return the $230 barrel that was mismarked. I do not mind a $50 problem but I do not need another project gun.

  6. #6
    Boolit Buddy
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    Maybe you'll get lucky and can neck size it with 7-30 die or a 7mm08 , flipping short neck tho! Case has very little taper,maybe a 30/30AI will size the body. CH4D might have a similar die reasonably priced. Happy searching. Best i can tell you for now. Todd/3leg

  7. #7
    Boolit Master



    cwlongshot's Avatar
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    Wow thats a short neck!!

    Yea I agree its def not a “factory” chamber! :

    I like the lil Waters! I havent replaced mine yet. This last spring, I sold off a 30/30 to help fund it and it hasnt happened yet.

    I made brass from 375 Winchester cases for mine.

    Good luck

    CW
    NRA Life member REMEMBER, FREEDOM IS NOT FREE its being paid for in BLOOD.

  8. #8
    Boolit Bub
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    I spoke to the owner at Reeder guns and he was very informative. If it was a GNR cartridge the dies are $125. It could be done but I would have to send barrel to confirm chambering. With the time and money it starts to become a project.

    Reeder did indicate case life would be longer due to headspacing on the shoulder, 300 fps faster, form from .30-30 Winchester, and indicated that short neck was not a problem (.375 Winchester and .38-55 would decrease internal volume).

    My two cents, factory cartridges exist for a reason. If this cartridge was on the cutting edge I think we would see it more. The GNR predates the 7-30 Waters by three years. If I need more 7mm power, the 7mm-08 or 7mm Magnum are called for calling for an Encore. Making a break action light magnum without factory printed and SAAMI support seems an unnecessary risk.

    Called seller and they are a class act and will refund me. I will let them take on the project if they desire.

  9. #9
    Boolit Master
    dk17hmr's Avatar
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    Was that a pistol or carbine barrel? A carbine would be a little deer stomper.
    Doug
    .................................................. ........................................
    Sticks and stones may break my bones but hollow points expand on impact.

    Taxidermists are cheaper than surgeons....keep shooting

    ΜOΛΩΝ ΛΑΒΕ

    Some people measure success in Minutes of Angle

  10. #10
    Boolit Bub
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    Carbine barrel. Highly effective yes but looking for semi-custom wildcat, not full-on project. If I need a true deer stomper I have bigger guns and calibers. Our 100-150 lb deer in SC do not require significant firepower.

    As a side note, my understanding is the Contender (particularly G1) is known for stretching if you get too wild with the energy and pressure.

  11. #11
    Boolit Bub
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    As a future note for anyone else reading this, Reeder confirmed that a standard neck-sizing die would push the 7mm GNR shoulder back if used.

  12. #12
    Boolit Master
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    Hornady makes universal neck sizer dies based on caliber. With that tiny neck I'd want specific dies though.
    Doug
    .................................................. ........................................
    Sticks and stones may break my bones but hollow points expand on impact.

    Taxidermists are cheaper than surgeons....keep shooting

    ΜOΛΩΝ ΛΑΒΕ

    Some people measure success in Minutes of Angle

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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