7mm 190gr A tip

Discussion in 'Big Stuff--7mm, 30 Cal, .338+' started by No i deer, Mar 26, 2020.

  1. No i deer

    No i deer

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    I can't seem to find the length of the 190gr A tip..
    Can one of you who has some measure one for me and post the measurement..
    It's so I can enter the figures into my ballistic calculator.
    Thanks NID
     
  2. 284winner

    284winner Gold $$ Contributor

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    Haven't seen the actual number from Hornady but second hand info was 1.640. Seems close as the 180 ELD is 1.538 I believe.
     
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  3. No i deer

    No i deer

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    Thank you :)
     
  4. No i deer

    No i deer

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    My bal cal tells me that the 190gr A tip would shoot inside the 184gr hybrids by around 8 inches at 1000yds in a 10mph full value wind..
    That's quite a saving
     
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  5. rardoin

    rardoin Silver $$ Contributor

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    Yes...that is what keeps me interested. However they must shoot as well as a 184 vertically to be competitive. If the vertical is twice a 184 the points ‘leaked out the corners’ may be more of a disadvantage. Time will tell.
     
  6. rardoin

    rardoin Silver $$ Contributor

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    I've got 100 en route. Hopefully I can get a test in the next week or so.
     
  7. No i deer

    No i deer

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    Looking forward too seeing and hearing the results :).
    How much are they over there..
    The 6.5mm A tips we have here now are £95 A box ouch.!!!
     
  8. rardoin

    rardoin Silver $$ Contributor

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    $.76ea here. Better than the initial estimated price of $.84. Still pricy
     
  9. rardoin

    rardoin Silver $$ Contributor

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    1.668" OAL
    .196" boat tail
    .679" bearing surface
    .875" base to ogive
    .793" ogive to tip

    *This is with my comparator insert (Hornady), your measurements may vary...other than OAL.

    Bearing surface is about 0.050" longer than the Berger 190 LRH
     
    Last edited: Apr 9, 2020
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  10. No i deer

    No i deer

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    Thank you sir :)
     
  11. No i deer

    No i deer

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    What length freebore would the 190gr A tips need to be..??
    0.280 ish..?
     
  12. rardoin

    rardoin Silver $$ Contributor

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    Depends on the neck length of the case used. I plan on testing them in a 7 Sherman Short mag; it has a bit longer neck than the parent RSAUM case or .284 Win. I spec’ed a reamer for .245” to run Berger 190’s but hope it keeps the A-tip bearing surface within the neck.
     
  13. No i deer

    No i deer

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    Mine are standard length necks and I trim them with a 7mm 08 lee cutter and pilot as it's the same length as the trim length as a 7mm saum at 2.025 inches
     
  14. rardoin

    rardoin Silver $$ Contributor

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    I checked the CBTO to lands in a .284 (straight) in a barrel with 420rd count. Original FB of .225" and has pushed out about 0.006" since new. At touch the bearing surface/boat tail junction was about .025" past the base of the neck. Based on this and the neck length on a .284 Win I would need .275"+ FB to have room for off the lands seating depth but still keep the bearing surface completely in the neck. I spec'ed my 7 Sherman Short reamer for .250" freebore; considering the long neck on this cartridge it should provide plenty of freebore for the 190's of any make.

    So you see, @No i deer, you do have some idea;).
     
    Last edited: Apr 28, 2020
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  15. davidjoe

    davidjoe Skunkworks Gold $$ Contributor

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    The seating die had to be cranked down for the A-TIP’s even below their own ELDM which already requires a lower adjustment than even the 195 Berger.
     
  16. davidjoe

    davidjoe Skunkworks Gold $$ Contributor

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    Long bullet.
     

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  17. rardoin

    rardoin Silver $$ Contributor

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    Wow, I did not think it would be that much longer than an ELD-M. Add some fletchings to the arse end and you would have a decent bolt for a cross-bow:eek:.
     
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  18. No i deer

    No i deer

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    Hi Dave.
    Did you need a different seating stem for the very pointy 190gr A tips..??
     
  19. No i deer

    No i deer

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    So are you saying you need way more freebore than you have then..?
    Did you get time too test the A tips before the lockdown..??
     
  20. rardoin

    rardoin Silver $$ Contributor

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    Not if you are using a Wilson arbor press die. I cannot answer concerning other brands or types.
     

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