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Thread: 45-90 with 45-70 dies

  1. #1
    Boolit Mold
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    Jul 2017
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    45-90 with 45-70 dies

    Once again I come to you knowledgeable folks with a newbie question. Can you load 45-90 cases with a 45-70 die set.I know adjustments will have to be made for the different lengths but can it be done or should I break down and get 45-90 dies? Thanks

  2. #2
    Boolit Master
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    Dec 2013
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    St.Germain, WI
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    I load for both of them with .45-70 dies. Thought is was standard operating procedure. Also made a spacer ring to go between them to eliminate having to readjust lock rings.
    The only amendment the Democrats support is the 5th.

  3. #3
    Boolit Master

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    It can be done but you may over size the neck if full length resizing. I have a mecham tool bushing die that will size 45-70, 45-90, and 45-100 by7 adjusting the height with different bushings it will also do 40-65 and a couple others.

    Similar to loading 357 with 38 spl dies a spacer can be made .300 thick 1 1/2" Od X .890 ID and .300 thick (45-70 case is 2.1" 45-90 is 2.4) and use this when loading 45-90. The 45-90 is a great cartridge and does very good.

    Are you planning on smokeless duplication style loads, Black powder substitutes, or true Black powder loads? The .300 that goes unsized may not ever be an issue with it at BP velocities.

  4. #4
    Boolit Mold
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    Jul 2017
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    BP only,never had the urge to go smokeless.I am thinking 85-90 grains of Ol Ezra in 2F with a 535 Postell and a wad in between.

  5. #5
    Boolit Master

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    I use mostly 1 1/2F olde Eynsforde inmine it works very well I currentlyhave loadsfor the 510 grn Lyman round nose, 535 grn Lymann Postell, and an Old West 550 grn shilouette bullet that are all good performers.

  6. #6
    Boolit Master
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    Nov 2010
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    australia
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    if you are not hunting, do you need dies at all?
    an expander used on new brass will allow finger seating, and from then on just reprime, charge, finger seat and shoot.
    the best bullet is one who's diameter just slides into a fired case.
    best accuracy is usually achieved this way.
    keep safe,
    bruce.

  7. #7
    Boolit Master
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    Mar 2005
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    3,099
    45-70 dies vary quite a bit internally even within the same brand.

    I have dies that have a 3/4" long straight sizing section for the case mouth. I have others where the parallel section is only about .400 long.

    Take a look at the inside of your dies and see what you think. Any set of dies may look (and be) OK but when you compare 4 or 5 different sets you will see some resemble FL dies and others resemble neck dies. Some also size the body a little and the neck a lot.
    EDG

  8. #8
    Boolit Master



    rfd's Avatar
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    +1 to what bruce moulds just posted. a straight expander (for new brass only), a compression die, and *maybe* a straight taper die (for the slightest of neck tension to keep the lubed or patched bullet from falling out) are all that needed to load bp cartridges. once fire formed, no neck expander is needed and loading is even simpler/easier.

  9. #9
    Boolit Master Don McDowell's Avatar
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    Yes you can use the 45-70 dies, but you have to set them pretty high on the press. Depending on what brand of dies you have there may not be many threads in the press. Biggest problem will be the expander die, and getting the seating die adjusted.
    In the end it's better just to get a set of 45-90 dies.
    GUSA #6
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  10. #10
    Boolit Master
    jrmartin1964's Avatar
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    Just as .38 Special dies can be used to load .357 Magnum, and .44 Special dies for .44 Magnum, the short answer to your question is yes, .45-70 dies can (and have been) used to load .45-90.


  11. #11
    Boolit Master
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    Back the size die off from the shell holder 3/8-7/16 inch, and the others will work fine with minor adjustment.
    LG
    Hav'n you along-Is like lose'n 2 good men

  12. #12
    Boolit Master
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    Been loading 45-70, 45-90 and 45-100 with 45-70 dies for....at least 25 years. Nary a problem if you set them up right, just as others have said.
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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