.243 A.I.

Discussion in 'Reloading' started by Jimm, Mar 16, 2005.

  1. Jimm

    Jimm Writers Guild

    Messages:
    1,270
    Joined:
    Jun 12, 2007
    I'm presently putting together a .243 ( actually a rebarrel) So I'mm looking for some pet loads for the .243 A.I> and what rate of twist their used in. thanks ,Jim
     
  2. James Jones

    James Jones Well-Known Member

    Messages:
    2,854
    Joined:
    Jul 1, 2002
    I have a 243Ai with a 1-8 twist Hart 26" and absolutly love it , great long range varmint and target caliber with the 105gr A-max or 107gr Sierra Match King its a sweet long range rig out to 1000yds and with a 95gr Nosler Partition its an awsome deer round.
    My rig seems to like powders in the 4350 range , its leaning to the VV-N560 real hard. I have run some 75gr Hornady V-max's out of it at max speed ( 3600+fps) with supper accuracy and the pop it puts down range is way high on the splat factor
     

  3. Jimm

    Jimm Writers Guild

    Messages:
    1,270
    Joined:
    Jun 12, 2007
    Thanks JD, what kind of groups are you getting at 500?IMR4350 is one of my favorite powders,how big a pile of does it take to shove the 107 sierra accurately?
     
  4. James Jones

    James Jones Well-Known Member

    Messages:
    2,854
    Joined:
    Jul 1, 2002
    This rig seems to hold a true 1/2 MOA out to around 600yds which is the max I've shot it so far , but my best 400yd groups is 1.5" for 5 shots. and that was with 105gr A-max bullets. It shoots the Sierra's well but not as well as the A-max's.
    As for the powder , My accuracy load for the 105's is 47.5grs of N-560 which leaves the muzzel at just under 3400fps. the best i get with the 4350 is about 3300fps with a load of around 47-48grs , I'd have to dig out my load books to make sure.
    one of the load cards I have here shows a super group with N-550 and a 75gr V-max bullet velocity is at the 3700fps mark.
    I did alot of load testing for this rig and used index cards taped to the target so i could later transfer to a load book just haven't yet.
     
  5. Jimm

    Jimm Writers Guild

    Messages:
    1,270
    Joined:
    Jun 12, 2007
    Thanks again JD,Should you get the chance to dig them out /ubbthreads/images/graemlins/smile.gif I'm all ears
     
  6. Jimm

    Jimm Writers Guild

    Messages:
    1,270
    Joined:
    Jun 12, 2007
    JDJones ,what ,if I might inquire, is your regimen for reloading the brass after initial fireforming?that is ,what dies do you use,how often do you need to go beyond neck sizing etc? Thanks ,Jim