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Thread: 45 70 Loads

  1. #1
    Member
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    Sep 2007
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    Default 45 70 Loads

    Can anyone recommend some good 45 70 loads. I am just starting to reload for this particular round. Rifle is a new Marlin XLR with 24" barrel and WW Guns ghost ring sights. I caught a deal on Cast Performance 460gr WLFNGC, about 300 bullets. I started using WLR primers and AA 2015 mainly due to the fact that I could not find much other data for the bullet. I have tried 39gr, 40, 41, 42 gr. The 39 gr load seemed most accurate. Is this bullet too heavy? Should I stick with cast or jacketed bullets?

    Would I be better off shooting a lighter bullet and getting slightly higher velocity? I mainly want a good accurate 50-100 yard load for various medium game. Any 45 70 expert advise would be appreciated.

    Thanks

  2. #2
    Member nrc's Avatar
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    Apr 2007
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    Default 3031

    I used 46gr IMR3031 with that same bullet in my guide gun, and was able to get 1600 fps (chrony'd). Start low, and work up.

    Nate

  3. #3
    Member Fiddleback's Avatar
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    Aug 2008
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    Default

    RL 10 works well for me with this bullet. Starting load for RL 10 is 40 grains (velocity 1545). The load I finally settled on was 43 grains (velocity 1620) ...this was the load my rifle liked best. COL was 2.525"
    I must say, although I'm not very sensitive to recoil...this load is pretty stiff!
    I cannot emphasize enough the importance of properly crimping this load ....actually any 45/70 load should have a good crimp. Ensure the crimp is tight and uniform; or you will experience ignition problems or bullet setback (not very fun). I use a Lee factory crimp die...best crimps I've ever had. If you don't have a Lee FCD, ensure you crimp in a separate operation after seating or you risk crushing your case. Speaking of seating, don't be surprised if you cut a ring into the top of the bullet with your seating plug. I had to have RCBS make me a seater plug to accommodate this bullet properly. Even though it may cut a ring in the nose, it really doesn't affect the performance of the cartridge, I just got tired of cleaning the lead off my seater plug all the time.

  4. #4
    Member RMiller's Avatar
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    Apr 2006
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    Montana
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    Default

    This is what I loaded in my 45/70 when I had the 26" Marlin Cowboy.

    I worked up some loads with IMR 4198 and speer 400 grain bullets. This is in my marlin cowboy rifle.

    42-----1716
    43-----1726
    44-----1775
    45-----1830
    46-----1858
    47-----1894
    48-----1929
    49-----1949
    50-----2016

    I plan on checking 48 grains to 50 grains again this spring in 50* weather. I think they will be just fine. It was 20*F outside today.

    I also shot 600 barnes originals in it

    28 grains of IMR4198 went 939 fps
    30 grains went 1122 fps

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