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  1. #1
    Join Date
    Feb 2011
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    Paisley
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    524

    Coal again

    Hi guys still feeling my way regarding reloading, I have a hornady style oal gauge and a hornady .223 modified case , however a king gent drilled and tapped a couple of my once fired rounds which I will be reloading this is the results
    Hornady !.840" to Ogive
    My case 1.458 to Ogive

    is this correct as it seems a big difference to me, ps this is an average over about 6 measurements with both cases and same 55gr bullet head,
    does this mean if I am using fire formed brass I go with one measurement and new brass with another im confused thanks in advance

  2. #2
    Join Date
    Mar 2010
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    Inverness, Highlands, God's own country.
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    Confused!!! Surely your reloaded case & bullet should be set to similar coal.?
    Pistol & Rifle Shooting in the Highlands with Strathpeffer Rifle & Pistol Club. <StrathRPC at yahoo.com> or google it.
    No longer Pumpin Oil but still Passin Gas!

  3. #3
    Join Date
    Jul 2007
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    Wandsworth, London
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    A drilled and tapped fire formed case should give very similar overall length. The discrepancy between the cartridges is huge.

  4. #4
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    Mar 2010
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    Inverness, Highlands, God's own country.
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    I could understand a couple of thou difference but not .4 of an inch??
    Pistol & Rifle Shooting in the Highlands with Strathpeffer Rifle & Pistol Club. <StrathRPC at yahoo.com> or google it.
    No longer Pumpin Oil but still Passin Gas!

  5. #5
    Join Date
    Feb 2011
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    Paisley
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    Thats what I was thinking Guys its a bit much, I will measure both the Hornaday and once fired later just the cases to see if they are the same or similar, just checked they are much the same slight difference at the neck but thats it , just wondering if this so called Hornady is a genuine or a fired case drilled and tapped as the mate cant remember where he got it lol but surly that wouldnt matter if the cases where the same size etc the readings should be close driving me nuts will have another go later at measuring COAL and see how that goes lol
    Last edited by blueheckle; 10-08-2018 at 07:12 AM.

  6. #6
    Join Date
    Sep 2015
    Location
    Tenterden, Kent
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    I suspect neck tension and actual case size. Hornady and Stoney Point before them, that their modified cases should never be resized. The case body and shoulder of a modified case is sized to SAAMI spec and the neck, a smidgeon greater, so to provide a friction fit that will allow for removal from the chamber and an accurate measurement gained. Your fired case, despite filling your chamber, is “too slack and out of spec” for the job.

    The cost of a “factory” modified case is not just the drilling and tapping...

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