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Thread: 40-60 Maynard 1873-thick rim

  1. #1
    Boolit Mold
    Join Date
    Jul 2016
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    CO
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    Cool 40-60 Maynard 1873-thick rim

    Just acquired model 16 Maynard-chamber 2.25 deep-slugged .418
    could be 40-70, will need to cast the chamber
    perfect bore so will need thick rimmed brass to shoot-any source?
    Would also like some vintage rounds of the 40-60 and 40-70 Maynard
    thx

  2. #2
    Boolit Master
    Bent Ramrod's Avatar
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    Apr 2005
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    Try Dixie Gun Works and S&S Firearms. Also Bob Hayley in Texas.

    And congratulations! The 16 is about the coolest Maynard there is.

  3. #3
    Boolit Master
    elk hunter's Avatar
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    Welcome!

    You may want to look at Wards Auctions for Maynard ammunition, probably won't be cheap but some should turn up there at some point.

    https://www.wardscollectibles.com/
    BIG OR SMALL I LIKE THEM ALL, 577 TO 22 HORNET.

  4. #4
    Boolit Master Reverend Al's Avatar
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    Victoria, B.C., Canada
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    You'd have to check the chamber dimensions of your rifle, but years ago a friend of mine had a Maynard thick rim in .40 calibre and he made shooter brass from .30-40 Krag cases by soft soldering a suitable thickness of washer onto the inside of the rim of the Krag cases. They worked just fine for him with the black powder loads he was shooting in it ...
    I may have passed my "Best Before" date, but I haven't reached my "Expiry" date!

  5. #5
    Boolit Mold
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    Chamber cast was 2.35 and if the rim-per cartridges of the world is .065 then we have a 40-70 Maynard. The same ref says 30-40 will work but short. Bore cam showed minimal micro pitting. Can't wait to find some washers or brass. May collectors show coming up here in Denver!!

  6. #6
    Boolit Master
    LynC2's Avatar
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    If you can't find brass, perhaps the Hornady .405 Winchester brass may be workable.
    NRA Endowment member, TSRA Life member, Distinguished Rifleman, Viet Nam Vet

  7. #7
    Boolit Mold
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    Rocky Mountain Cartridge Co turns from solid brass all types and will do 20 for $70-anyone used them-looks like they do about any case--
    thx

  8. #8
    Boolit Master
    Bent Ramrod's Avatar
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    Havenít bought Maynard cartridges from them, but my .22-15-60 SS brass is all from RMC.

    The fit and function could not be improved upon.

    The only downside is that, not being drawn, they do not last long when run through sizing and expanding dies. Once I found that out, I stopped resizing and expanding and just deprimed and reloaded the fired cases, seating the boolits by hand. Theyíve worked fine ever since, with no cracked mouths.

    That reloading regimen is doubtless what you will be doing as well, so the cases should work fine for you.

    If you have any ideas about reduced case capacity for smaller powder charges, thicker case mouths for special boolits, odd lengths for your particular chamber, talk to them before ordering. They can make the shells to a standard pattern or customized, whatever you want.

  9. #9
    Boolit Bub
    Join Date
    Oct 2015
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    Stephens City, VA
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    Are you sure it is an 1873 rifle. The 1873 rifles used a thick head case with a rim thickness of .135". The 1882 rifles uses a rim thickness of .070". The 40/70 cartridge is a 2.4" long cartridge so your chamber depth seems off. The Krag brass is short for the 40/70. The Hornady 405 brass can be made to work but may need to be reduced in diameter a few thousandths right in front of the rim. I have brass headspace rings made to convert the 405 brass into the 1873 brass. They press in place and are considered permanent once installed. Make sure what you have. I may be able to help you out.
    Click image for larger version. 

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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