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Thread: 6-284 vs 6mm Rem AI

  1. #1
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    6-284 vs 6mm Rem AI

    How do these 2 compare as far as case capacity/efficiency?
    12 LRP 243 Win.,6x25 Millet long range.200 action,Shaw 308 HB,Vortex 6.5x20x44.116 action,Shaw 6mmAI ,8x32 Mueller.All with SAV-2's

  2. #2
    nsaqam
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    Re: 6-284 vs 6mm Rem AI

    The 6-284 has a bigger boiler room and is a true SA cartridge whereas the 6 Rem AI is an intermediate length cartridge not particularly well suited to the confines of a SA mag box.

  3. #3
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    Re: 6-284 vs 6mm Rem AI

    I'm picking up a long action and am torn between these 2 for a build.I already have brass and dies for a 6mm Rem.,and I won't have to do any case forming.
    12 LRP 243 Win.,6x25 Millet long range.200 action,Shaw 308 HB,Vortex 6.5x20x44.116 action,Shaw 6mmAI ,8x32 Mueller.All with SAV-2's

  4. #4
    Paid Member calib's Avatar
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    Re: 6-284 vs 6mm Rem AI

    if you already have the stuff to do a 6mm ai them do one of those i have seen some good things from thos with other people.

    i am going from a 243ai to the 6-284 i should be getting my barrel in a week to 3 weeks. cant wait to get it loaded up and shooting.

  5. #5
    Paid Member Blue Avenger's Avatar
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    Re: 6-284 vs 6mm Rem AI

    I like both my 6 rem ( 1"@200 from a 17" barrel ) and 6 rem AI. Also my 6br. I got these after hearing the 6-285 has a shorter life and can be finicky to get small groups.
    I have a 243 & .243AI also, but not done much with then. Thinking 6mm-06 down the road.
    .223 Rem AI, .22-250 AI, .220 Swift AI .243 Win AI, .6mm Rem AI, .257 Rob AI, .25-06 AI, 6.5x300wsm .30-06 AI, .270 STW, 7mm STW, .416 Taylor

  6. #6
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    Re: 6-284 vs 6mm Rem AI

    What's the best brass for 6mm Rem. Ackley? Probably not made by Nosler or Lapua are they?
    12 LRP 243 Win.,6x25 Millet long range.200 action,Shaw 308 HB,Vortex 6.5x20x44.116 action,Shaw 6mmAI ,8x32 Mueller.All with SAV-2's

  7. #7
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    Re: 6-284 vs 6mm Rem AI

    I have no experience with the 6mmAI but I agree with Blue that the 6-284 can be finicky. I used mine for F-class and it shot good on certain days and not so good on others. I only got 800rnds down my 6-284 before the throat was gone.
    I believe the longer 6mm neck would help with the throat erosion but it is just a theory based on my random thoughts! :D

    Steve
    LOVIN LIFE!

  8. #8
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    Re: 6-284 vs 6mm Rem AI

    No recommendations on brass? :-\
    12 LRP 243 Win.,6x25 Millet long range.200 action,Shaw 308 HB,Vortex 6.5x20x44.116 action,Shaw 6mmAI ,8x32 Mueller.All with SAV-2's

  9. #9

    Re: 6-284 vs 6mm Rem AI

    If you're already working on a long action, why not go with a 6mm-06?

  10. #10
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    Re: 6-284 vs 6mm Rem AI

    Don't feel like turning necks and don't need the small velocity gain.
    12 LRP 243 Win.,6x25 Millet long range.200 action,Shaw 308 HB,Vortex 6.5x20x44.116 action,Shaw 6mmAI ,8x32 Mueller.All with SAV-2's

  11. #11

    Re: 6-284 vs 6mm Rem AI

    Well if you do a -284 you're coming down from .264, (presumably) which is .007" more than if you use .25-06 brass... Just food for thought...

  12. #12
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    Re: 6-284 vs 6mm Rem AI

    I'm leaning towards the AI more all the time.Now if I can just find a good barrel w/o having to wait 6 mos.
    12 LRP 243 Win.,6x25 Millet long range.200 action,Shaw 308 HB,Vortex 6.5x20x44.116 action,Shaw 6mmAI ,8x32 Mueller.All with SAV-2's

  13. #13
    Paid Member Blue Avenger's Avatar
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    Re: 6-284 vs 6mm Rem AI

    Quote Originally Posted by 243LRP
    I'm leaning towards the AI more all the time.Now if I can just find a good barrel w/o having to wait 6 mos.
    6BR can be punched out
    .223 Rem AI, .22-250 AI, .220 Swift AI .243 Win AI, .6mm Rem AI, .257 Rob AI, .25-06 AI, 6.5x300wsm .30-06 AI, .270 STW, 7mm STW, .416 Taylor

  14. #14
    Paid Member calib's Avatar
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    Re: 6-284 vs 6mm Rem AI

    you may be able to find one if you dont mind a varmint contour at the savage-barrels.com they are a sponsor and if they have one in stock it will only take a week

  15. #15
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    Re: 6-284 vs 6mm Rem AI

    I love my 6mm AI. Use 6mm rem brass. Fire formed while doing load developement then annealed. Cases have never needed trimming as they will shorten upon fire-forming. 40* nk means almost "O" case stretch & very little bolt thrust. Mine is a twelve twst "critter gitter" shooting 70 & 75 grain bullets. About 1200 rounds through it to-date. Minimal throat erosion & expect at least another 1200 rounds based on present wear. Started w/ Redding dies & got lousy concentricity w/ neck sizer 'til I bought a Lee collet. Which got me to shooting bug holes. RL-19 also woke this cartridge UP! Obviously the choice is yours. But if I had a "do over" I'd stick w/ the 6mm AI. Good luck with your decision :)

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