Advice on which .243/6mm

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by PAMONTY, Aug 12, 2003.

  1. PAMONTY

    PAMONTY Member

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    Aug 10, 2003
    Ordered a Hart heavy contour in 8 twist the other day. I plan to shoot the 105 A-MAX. I haven't decided on which caliber yet though. Some say the 6mm-284 is a barrel burner, so I don't know. Maybe the .243AI, I have seen alot of these lately.

    Any suggestoins???

    Also would you have anything done with the neck?
    Thanks
    PennMonty
     
  2. jb1000br

    jb1000br Well-Known Member

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    243 ack is probably the best compromise for an overbore 6mm as far as efficiency and barrel life go. plus you can get lapua or norma brass ready to go. a buddy of mine has both and he is tickled pink with the results with his 243 ack done by R.W.Hart & son in nescpoeck pa.

    JB
     

  3. Darryl Cassel

    Darryl Cassel Well-Known Member

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    Pennmonty

    Don't overlook the straight 243 Winchester.

    I have a 30" 8 twist barreled rifle in the 243 Win. that shoots to 1100 Yards quite well and with repeatability. The 30" barrel gives much better velocity then a shorter one will in the 6mm caliber.

    I use the 105 to 107 gr bullets in it and Lapua brass.
    The effeciency of the 243 is well documented and the barrel life is MUCH better then the 6/284 or the Ackley or Gibbs versions of the 6mm.
    I also have the 6/284 and have owned the Ackley and Gibbs 6mms over the years so I'm able to made the comparisons.

    Good luck in your decision.

    Later
    DC
     
  4. Mysticplayer

    Mysticplayer Writers Guild

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    Do some research into the 6BR Norma, I think you will be impressed. Many 1000yd BR shooters are now using this and 105/107gr bullets. From 30" barrels, performance is very good, brass and throat life is wonderful, recoil is very mild. Ensure that you are using the long throat version.

    If not, I would go with the 243, Reg or AI is up to you, because cases are so easy to get and you can form from 308match brass if necessary.

    Jerry
     
  5. *WyoWhisper*

    *WyoWhisper* Guest

    Got somthing else for you to think about...

    I would have said 243AI.. no brainner..
    BUT... I have just finished some test loading with a 6mmAI WOW..

    3250fps with a sierra 107 SMK.. not sure a 243AI that can do that.. I still have no pressure signs...

    Just another thought.... the only advantage a 243AI has is brass...
     
  6. mbianchini

    mbianchini Well-Known Member

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    *WyoWhisper*
    I drive 106 Clinch Rivers 3340 out of my 243AI with no problems out of a 29" Lilja 3 groove. At one time i had them going a bit over 3400 but brass life was bad.243AI Crono Slip

    242AI PICTURES
     
  7. *WyoWhisper*

    *WyoWhisper* Guest

    mbianchini ,

    I will get to do more load development here in a week or so....

    I hope to get 3500 outta the 107's... we'll see. I know that i can hold more powder and I have a 30" Krieger on this rifle so I should be able to get there...

    hmmm.. I like the friendly competition stuff...


    [​IMG] [​IMG]
     
  8. PAMONTY

    PAMONTY Member

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    Well, you guys have helped me answer a question I never thought to ask. The barrel I have on order will come 32" long and I was going to cut it down to 28". But after hear velocities you guys are getting I think we will leave it at 30"

    PennMonty
     
  9. ottsixx

    ottsixx Active Member

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    Both rounds are super rounds the 243 win/6mm Remington I dont dig any of that ackley jazz I think if it came down to that Id just go the 6mm Rem. but I shoot some 243 winchesters that are just the neatest thing since sliced cheese...........and deadly accurate to boot..............
     
  10. adam32

    adam32 Banned

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    I'm pushing 105 Bergers to 3350 with a .243 AI out of a 25" Broughton...gun)
     
  11. lovdasnow

    lovdasnow Well-Known Member

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    congrats on resurrecting a 6 year old thread. i like my 243 with the 90gr bergers, but now the 6x47 has caught my eye.
     
  12. Iron Worker

    Iron Worker Well-Known Member

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    Hey the 6x284 rules ! Mine has over a 1,000 rnds through it. I know for fact it has throat erosion and it still produces 12" MOA at 25 yds.
     
  13. Albertavarminter

    Albertavarminter Member

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    Hey adam,
    Care to share your load data as I can only push 3120 fps with the 105 Amax from my 243AI in a 26" gain twist barrel.

    49.5 Retumbo, CCI 200, 105 Amax.

    Thanks
     
  14. Jayhawk

    Jayhawk Well-Known Member

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    Anybody shooting the 6mm-06 or 6mm-06 AI? That has to move the 105 Amax right along.