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Thread: Kimber Montana Ascent 280AI Load Development

  1. 16-03-2021, 08:43 AM #1
    Tikka7mm08
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    Kimber Montana Ascent 280AI Load Development

    Starting on this and off the bat the chamber is tighter than the Forbes (won't chamber FL sized rounds that the Forbes has no problem with).

    New Norma brass also tight with a very firm bolt close.

    Set up FL and slowly sized and test chambering and now have brass comfortably fit. Upside is less powder likely required compared to the Forbes for hopefully similar results. Will try some RE26 and 162gn ELDMs ASAP.

    Not sure if best to use standard or magnum primer...

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  3. 16-03-2021, 08:49 AM #2
    hthomas
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    I am running standard primers in both my 280AI and have excellent consistency with RL-26 and the Hornady 162gr ELD-M. What velocity are you getting in your Forbes?
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  4. 16-03-2021, 11:21 AM #3
    Tikka7mm08
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    2960 with 61gn RE.
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  5. 16-03-2021, 05:12 PM #4
    Tikka7mm08
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    Seems the match chamber in Kimbers is a bit tighter according to the wise people of the interweb. The bump required isn't excessive (in terms of cam-over on the press) so will see how we get on.
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  6. 16-03-2021, 05:34 PM #5
    Benj
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    I am running 61 grains of rl26 with the 162 eldm Norma brass and mag primers for 2970. Have had a few issues with delayed killing inside 300 on deer with shoulder shooting not sure if anyone else has noticed this?
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  7. 16-03-2021, 05:44 PM #6
    Stocky
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    Quote Originally Posted by Benj View Post
    I am running 61 grains of rl26 with the 162 eldm Norma brass and mag primers for 2970. Have had a few issues with delayed killing inside 300 on deer with shoulder shooting not sure if anyone else has noticed this?
    What rifle? And I'd be surprised but could be too high impact velocity.
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  8. 16-03-2021, 05:52 PM #7
    Tikka7mm08
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    Yes had exact same with ELDM, not dead on spot but dead on feet going 15-20 yards.
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  9. 16-03-2021, 06:08 PM #8
    cameronjackwhite
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    24” proof barrel, 60grains rl23 and 160tmk for 3050fps cci mag primer
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  10. 16-03-2021, 06:10 PM #9
    Tikka7mm08
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    That's a great speed.
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  11. 16-03-2021, 06:17 PM #10
    cameronjackwhite
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    Quote Originally Posted by Tikka7mm08 View Post
    That's a great speed.
    Real happy, validated to 400. I found rl23 to be faster than 26 in my Sako
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  12. 16-03-2021, 06:18 PM #11
    Tikka7mm08
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    Interesting...got a ton of RE26 so will see how it goes.
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  13. 16-03-2021, 06:19 PM #12
    dannyb
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    Quote Originally Posted by Tikka7mm08 View Post
    Interesting...got a ton of RE26 so will see how it goes.
    show off
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    #DANNYCENT
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  14. 16-03-2021, 06:28 PM #13
    Tikka7mm08
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    Haha... yep flush for once. Hopefully a good load will rapidly appear...(that would also be unusual).
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  15. 16-03-2021, 06:47 PM #14
    MSL
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    Quote Originally Posted by Tikka7mm08 View Post
    Haha... yep flush for once. Hopefully a good load will rapidly appear...(that would also be unusual).
    It would certainly be less amusing if you stumbled straight onto the perfect load


    Sent from my iPhone using Tapatalk
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  16. 16-03-2021, 06:48 PM #15
    Tikka7mm08
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    Haha...you will be the first to hear of that!
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