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Thread: .243ack imp fireforming load

  1. #1

    .243ack imp fireforming load

    I have a .243ack imp and need to fireform my new brass using 69gr Bergers and Varget.
    can any of you give me a load for this please?

    I'm thinking of starting around 38gr.


    Any advice greatly received!



    thanks

  2. #2
    Just work up a load and go and use it for practice, stalking or target shooting. I got a nice sika stag with a fire forming load in my 243 Ackley. Regards JCS

  3. #3
    Just shoot your normal load, I run an ackley with the same bullet, its a hell of a tip. I run mine on 41gn of Varget but could go hotter. your 38gn would seem a very soft load.

  4. #4
    My concern was that it's a standard case, we'll until I squeeze the trigger it is!

    Now you mention it I'm sure I used to run 41gr with the 68gr Bergers in my .243win!


    In fact, I've just got off my arse and found my load data book, I used 41gr Varget with 74gr Precision Ballistic bullets and the same load for the 68gr Bergers.

  5. #5
    One additional comment. When I fire formed, I was using a variety of heavier bullets and tried to seat them so the bullets were slightly into the lands. When I shot 70 gr SMKs, they were ~40 thou off the lands.
    ​Regards JCS

  6. #6
    Hi Jcampbellsmith, yeah, I was considering doing the same, I'm going to seat them so they are 'kissing' the lands!

    Once they are all fire formed the fun will start then with some 105gr A-max load development!


    ​Thanks for for the replies gents.

  7. #7
    Quote Originally Posted by TotalNovice View Post
    Hi Jcampbellsmith, yeah, I was considering doing the same, I'm going to seat them so they are 'kissing' the lands!

    Once they are all fire formed the fun will start then with some 105gr A-max load development!


    ​Thanks for for the replies gents.
    Hi mate ,
    I was using the same 105 grain A-max .
    I was using new Lapua brass , a fast burning for bullet weight powder H4895 at a grain under maximum load , and seated the 105 A-max well in to the lands ( so no rearward thrust of case to bolt face and a good form of case after firing ) - this advise was gained from the Nosler reloader manual covering the ackley improved forming.
    Done the same with the 6.5-55 ackley improved too as in forming!!
    Last edited by interceptor; 30-10-2013 at 21:40.

  8. #8
    Quote Originally Posted by interceptor View Post
    Hi mate ,
    I was using the same 105 grain A-max .
    I was using new Lapua brass , a fast burning for bullet weight powder H4895 at a grain under maximum load , and seated the 105 A-max well in to the lands ( so no rearward thrust of case to bolt face and a good form of case after firing ) - this advise was gained from the Nosler reloader manual covering the ackley improved forming.
    Done the same with the 6.5-55 ackley improved too as in forming!!

    Hi intercepter, I was toying with using N165 with the 105's mate, that or reloader22.

    ​A guy I know who we shall call 'Enchilada' gave me some excellent advice on the .243ai with the 105's

  9. #9
    Quote Originally Posted by TotalNovice View Post
    Hi intercepter, I was toying with using N165 with the 105's mate, that or reloader22....
    When I had my std 243 Win, I had some success with N165 and 105 A-Max and 107 SMKs loaded around the 43.5 gr mark. NB, that was my standard loading and I wasn't going for warp factor velocity. I was given some RL-22 to try, but never got round to it.

    Regards

    JCS

  10. #10
    When fireforming improved cases its a good idea to use the fastest powder reccommended for the parent cartridge, the pressure spike peaks much quicker then when using slower powders and aids blowing out of the case to fit the improved chamber.

    Ian.

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