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Thread: 7mm-08 AI Reloading Data

  1. #1

    7mm-08 AI Reloading Data

    Hi,

    I am about to start reloading my 7mm-08 AI. I have some questions regarding this that I would like some input on.

    I need to know what I should trim the cases down to as I have 40 degree AI.

    I know the loads as I have this data but I have no data on "trim to length".

    I am using;
    Fed Cases
    VV N140 Powder
    Nosler 140 Ballistic Tips
    CCI Benchmark Primers

    Rifle is Sako 75 with wirther 19" Barrel with 9/14 twist.

    If anyone has some data I would really like to know.

    Regards
    Colin.

  2. #2
    Hi Colin,

    You got back ok then?? We saw you pass us on the motorway going a lot better than us! What is the difference between a 7mm08 and 7mm08 AI? Im intrigued! Ive just been on the phone to Steve Kershaw about a custom 7mm08 as a christmas present to myself!

    Ben

  3. #3
    There's a couple of links to similar threads about Ackley Improved at the bottom of this page.

  4. #4
    I am not sure the exact dimensions but, since factory 7mm-08 ammo/brass is used to fireform the IMP brass, then 7-08 trim-to length would seem reasonable.~Muir

  5. #5

  6. #6
    Quote Originally Posted by gitano View Post
    51.96mm or 2.046 inches.

    Paul
    Hi gitano,

    Are you sure this is correct as the 7mm-08 non ackley case length is 2.035. When I have measured ALL my fire-formed cases, they are between 2.027 - 2.035. I even have some that measured 2.010 - 2.017. SO I am sort of stuck as to what I should be doing for datam on my trim to length case size.

    Regards
    Colin

  7. #7
    Quote Originally Posted by arthursc View Post
    Hi,

    I am about to start reloading my 7mm-08 AI. I have some questions regarding this that I would like some input on.

    I need to know what I should trim the cases down to as I have 40 degree AI.

    I know the loads as I have this data but I have no data on "trim to length".

    I am using;
    Fed Cases
    VV N140 Powder
    Nosler 140 Ballistic Tips
    CCI Benchmark Primers

    Rifle is Sako 75 with wirther 19" Barrel with 9/14 twist.

    If anyone has some data I would really like to know.

    Regards
    Colin.
    obvioulsy you have a custom chamber so once you have fireformed your brass,sacrifise 1 case and get yours a chamber lenghth gauge which will give you the exaact chamber lenghth,they only cost a few pounds,I think I may still have one I made for my 7mm,you can borrow it if it helps.
    dont trim your caes untill there all fireformed to AI as you will be allowing the brass to stretch to were it wants to be,if your chamber is a lot longer than your brass just trim to the shortest case of the average case length which may mean you scrapping a few cases if there far to short,but to be fair in a hunting rifle it wont make much difference just batch them

  8. #8

  9. #9
    All

    Many thanks for the advice. Wanted to let you know what the outcome was of my 1st test load;

    I think the 3 rounds of the same load speaks for them selves.

    Regards
    Colin.
    Attached Thumbnails Attached Thumbnails 7mm-08 AckImp.jpg  

  10. #10
    If that's at 100 meters, !!! and

    Way to go!

    Paul

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