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Thread: Best powder and primers for 143gn Hornady ELD-X 6.5 x 55mm

  1. #16
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    In the military throated m38 that I have, the lands are too far away to be a consideration. I seat for connectivity. Haven't had any issues though a guess some projectiles may be more jump sensitive than others.
    Using win760 and going to imr4831 when I've finished that . Hope to squeeze a little more speed within my m38 pressure limits.

    Would go Slower Burn with 7828 if not satisfied

  2. #17
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    Concentricity

  3. #18
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    Many rifles have a 1-2 degree taper in the throat area so to talk about touching lands can be quite a vague notion. i my S&L bbl the bolt fact to lands (touching the start of the taper) is 2.422" while moderate jam is 2.480". For my bullet seating calculation I use 2.472". (bolt face to ogive)

    Most of my rifles ,when shooting a secant ogive bullet seem to like a jump of 40-200 thou" rather than any sort of jam. In the instance of trialling this bullet and loads I will use a jump in the order of 45-80- thou' to start. COAL approx 3.15-3.18" and see how we go.
    Summer grass
    Of stalwart warriors splendid dreams
    the aftermath.

    Matsuo Basho.

  4. #19
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    haven't tried eld's but other projectiles I've loaded in mine and especially lighter ones or bergers are only just being held by the case neck at jam OAL..
    I had a load I liked using 120 sierra's, unsure now of OAL but several years ago and the rifle has been with a mate since then.
    I just got it back and have been thinking about developing a load with some 140s and experimenting with jump distance.
    Other rifles I have often seem to like quite a big jump
    120 thou in my 7rm. for example
    Would shorter barrel length have any influence on the type of powder best suited?
    maybe faster burn required for shorter barrel?

 

 

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