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Thread: Kimber Montana Ascent 280AI Load Development

  1. #91
    Member Tikka7mm08's Avatar
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    0.5 and 3/4MOA groups shows patience pays off...to be fair I should have got it bedded much sooner.
    Micky Duck, dannyb and Gkp like this.

  2. #92
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    Did Nathan bed this one ? I have just ordered two of his full length bedding kits, only fourty something bucks per rifle
    Micky Duck likes this.

  3. #93
    Member Tikka7mm08's Avatar
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    No Zach did it. Also done the Montana 308 as I figured might as well even though I was happy with how it was shooting. Can't wait to try the 308.

  4. #94
    Member Tikka7mm08's Avatar
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    Group shot this evening. 180gn ELDM with 58.6gn RE26, CCI LRM primer, Norma brass. COAL 3.380" per @burtonator.




    Sent from my SM-G998B using Tapatalk
    Last edited by Tikka7mm08; 29-01-2022 at 10:04 PM.
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  5. #95
    Caretaker - Gone But Not Forgotten jakewire's Avatar
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    Lovely.
    Been a hard road.
    Tikka7mm08 likes this.
    Quis custodiet ipsos custodes?

  6. #96
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    Watching with interest

  7. #97
    Member SPEARONZ's Avatar
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    180eldms at over 2800fps is going to be devastating
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  8. #98
    Member Tikka7mm08's Avatar
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    Drop table with 180gn ELDM @ 2850fps 100y zero. Note BC used is 0.796. This BC is from the hornady website. I'll be able to try real world test on 600y gong at home.

    Absolute hammer.


    Last edited by Tikka7mm08; 31-01-2022 at 10:10 AM.

  9. #99
    Member Nathan F's Avatar
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    That down range energy is impressive
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  10. #100
    Member Tikka7mm08's Avatar
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    Yep it thumps the 162gn on energy but the 180gn isn't flatter shooting until 1000y. Still, very little given away by the 180.
    Moa Hunter likes this.

  11. #101
    MSL
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    What a relief to finally get a load sorted aye mate, and mag fed


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  12. #102
    Member Tikka7mm08's Avatar
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    Yeah, watch out for Internet sourced advice.

  13. #103
    Member Tikka7mm08's Avatar
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    COAL adjusted to 3.340" for mag fit. Unlike 3.380", which is not mag fit. FFS.

    58.4gn (0.5 MOA first shot cold clean barrel to left) and 58.8gn shot well. Going to try 59.0gn to see if group comes in or holds nearer to 2850fps. Only 12-13deg today.





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    gqhoon, Micky Duck and dannyb like this.

  14. #104
    Member Tikka7mm08's Avatar
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    59gn did much the same as 58.8gn. Interesting the 40 thou shorter COAL has (I think although small sample size) reduced pressure as speed has dropped from 2850fps. No pressure and I feel there is another node above 59gn but going to now settle at 58.4gn and 0.5 MOA a little over 2800 fps.

    Anyone able to confirm the BC of the 180 eldm? Seen two Hornady sources quote .777 and .796.



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  15. #105
    Member chainsaw's Avatar
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    LOL ... Anyone able to confirm the BC of the 180 eldm? Seen two Hornady sources quote .777 and .796.
    Glad to see its not just me.
    Hornady like to make it as confusing as possible with BCs for different twist rates and different velocities.
    I've seen G1 numbers quoted from 0.810, 0.796 (original hornady claim) to 0.703 (Litz).
    I've come up with my "own" BC based on twist, muzzle velocity and range out to 1000 yrds for my N28 = 0.756.
    As stated on the box by Hornady ...
    180ELDMs >2500 fps 0.777
    2230 - 2500 fps 0.748
    1500 - 2200 fps 0.731


    Have verified this on gongs at 625 yards but you'd probably want to stretch further out to really verify the number.
    Tikka7mm08 likes this.

 

 

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