AMP Annealer VS No annealing Vs Torch Head Annealer Vs 2nd/3rd Shot

Discussion in 'Long Range Hunting & Shooting' started by jdmecomber, Feb 27, 2018.

  1. WalksLikeADeer

    WalksLikeADeer Active Member

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    Holy smokes! I had no idea that many would fail! I've never had a .243 case fail but use mostly Remington brass. I have over 12 firings on Remington 7mm Rem Mag brass and use a rotating dual torch annealing setup.

    I've never tried Hornady brass and don't think I will after hearing this! Thanks for your time and sharing this test.
     
  2. phorwath

    phorwath Well-Known Member

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    It was too late for me. My rifle was already chambered in a 375 Ruger wildcat. Hornady is currently the only manufacturer of 375 Ruger cartridge cases. So I went the long haul route and converted Norma and RWS 8x68S casings into 375 Ruger cases. Fire forming was required with the Hornady 375 Ruger cases anyhow, for my 30/375 wildcat chamber. So might as well start out with good quality parent casings!

    A Hornady production engineer can probably figure out what went wrong with the manufacture of these casings. But it's hard to regain confidence, once it's lost.
     
    Last edited: Mar 3, 2018
  3. jdmecomber

    jdmecomber Official LRH Sponsor

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    I misread Alex Findlays email. It stated you will get full accuaracy benefits annealing every reload.

    I agree, even with flawed brass the Sd and Es are acceptable from a factory chamber and a difference can be seen.
     
    Last edited: Mar 3, 2018
  4. jdmecomber

    jdmecomber Official LRH Sponsor

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    I can't really shoot for groups with the magneto on if I am going to test for accuracy along with Es and sd. Maybe we should get Labradar
     
    Last edited: Mar 3, 2018
  5. jdmecomber

    jdmecomber Official LRH Sponsor

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    Hornady test

    Group 1 Amp annealing every firing
    1. 2. 3. 4. 5.
    2879 2876 2879 2887 2890
    2879 2883 2884 2884 2887
    2871 2880 2891 2894 2882
    Fail 2887 2911 2879 2881
    Fail 2883 2892 2884 2877

    Es. 11 27 15 13
    Sd. 4 10 5 5


    Group 2 Anneal after 2 firings
    1. 2. 3. 4. 5.
    2884 2868 2897 2887 2889
    2883 2858 2901 2891 2887
    2896 2904 2900 2901 2887
    2892 2888 2897 2891 2889
    2886 2894 2891 2898 2887

    ES. 46 10 14 2
    Sd 18 3.8 5 1


    Group 3 Torch Anneal every firing
    1. 2. 3. 4. 5.
    2866 2881 2897 2892 2885
    2866 2887 2889 2886 2879
    2881 2874 2888 2891 2874
    2879 2889 2884 2888 2868
    2881 2891 2889 2875 2866

    ES 17 13 17 19
    SD 6 4 6 7


    Group 4 Anneal after every 3 firings
    1. 2. 3. 4. 5.
    2879 2904 2907 2896 2879
    2881 2909 2897 2892 2881
    2866 2891 2898 2891 2902
    2879 2901 2913 2890 2883
    2876 2876 2903 2884 2875

    ES. 36 16 12 27
    SD. 13 6 4 10


    Group 5 no annealing
    1. 2. 3. 4. 5.
    2882 2880 2898 2895 2899
    2884 2896 2908 2898 2884
    2901 2902 2907 2904 2870
    2897 2911 2902 2901 2884
    2885 2901 2906 2899 2897

    ES. 31 10 9 29
    SD. 11 4 3 11

    It isn't showing as typed but there is all the data.
     
    Last edited: Mar 3, 2018
  6. phorwath

    phorwath Well-Known Member

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    Nice. No Lapua case failures?
     
  7. jdmecomber

    jdmecomber Official LRH Sponsor

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    This is all the Hornady test. I think once you see it all. The case failures really didn't do much to the data
     
  8. jdmecomber

    jdmecomber Official LRH Sponsor

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    Take group 3 for example Torch annealing.

    4. Five shot groups with consistent extreme spreads and standard deviations

    ES. 17, 13, 17, 19
    Sd. 6, 4, 6, 7

    Group 1 Amp annealing
    ES. 11, 27, 15, 13
    Sd. 4, 10, 5, 5
    One shot from group one was high at 2911
     
  9. phorwath

    phorwath Well-Known Member

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    Gotcha.
     
  10. Wedgy

    Wedgy Well-Known Member

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    So group 2 "anneal after 2 firings" had an ES of 46 while group 5 "no annealing" had a lower ES of 31 ??? Something isn't right there.
    By the way what method was group 2 annealed ?

    Thanks again for your work !
     
  11. jdmecomber

    jdmecomber Official LRH Sponsor

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    Group 2 was Amp annealed

    What I noticed was once the brand new brass was fired, if the case wasn't annealed for the next firing the groups had high extreme spreads.

    Group 2 had a 46 Es
    Group 4 had a 36 Es
    Group 5 had a 31 Es

    All the groups that were annealed after the first brand new brass firing, the sd and es were cut in half or better.
     
    Last edited: Mar 3, 2018
  12. rscottb

    rscottb Active Member

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    Here is a maybe idea, mount the Magnetospeed to your picatinny rail and keep it off your barrel and you should do OK for accuracy.

    https://mkmachining.com/product/preorder-magnetospeed-v3-picatinny-rail-mount/

    The Magnetospeed also has a rail mount, but is limited to a rail near the muzzle.
     
  13. jdmecomber

    jdmecomber Official LRH Sponsor

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  14. jdmecomber

    jdmecomber Official LRH Sponsor

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    I will complete another test on Wednesday or Thursday. I will run Lapua brass this time. I have some that is once fired.
     
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