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Thread: 6-284 vs 6mm Rem AI

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  1. #1
    Team Savage 243LPR's Avatar
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    6-284 vs 6mm Rem AI

    How do these 2 compare as far as case capacity/efficiency?
    "An armed society is a polite society"
    "...shall not be infringed" What's the confusion?

  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.
    "An armed society is a polite society"
    "...shall not be infringed" What's the confusion?

  4. #4
    Basic 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
    Super Moderator 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, 28 nosler, .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?
    "An armed society is a polite society"
    "...shall not be infringed" What's the confusion?

  7. #7
    stevec
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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

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

    No recommendations on brass? :-\
    "An armed society is a polite society"
    "...shall not be infringed" What's the confusion?

  9. #9
    helotaxi
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    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.
    "An armed society is a polite society"
    "...shall not be infringed" What's the confusion?

  11. #11
    efw
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    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.
    "An armed society is a polite society"
    "...shall not be infringed" What's the confusion?

  13. #13
    Super Moderator 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, 28 nosler, .416 Taylor

  14. #14
    Basic 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
    gotcha
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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 :)

  16. #16
    Team Savage 243LPR's Avatar
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    Re: 6-284 vs 6mm Rem AI

    I'm actually looking for a varmint contour but they're only showing it in bull(too heavy).I could pre-order one from gun shack but not sure about Shaw quality to be a tack driver.
    "An armed society is a polite society"
    "...shall not be infringed" What's the confusion?

  17. #17
    gotcha
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    Re: 6-284 vs 6mm Rem AI

    You might check w/ Krieger. They show BBL inventory on line. When I built my .257AI they just happened to have the perfect bbl "ready to go". They will set up for bbl nut or standard shoulder & also chamber if you'd like.

  18. #18
    adam330
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    Re: 6-284 vs 6mm Rem AI

    Gotcha,
    Did you have to special order your Lee collet die? I have a 6mmAI barrel ordered and am getting ready to purchase all of my reloading components. Any knowledge you can provide would be greatly appreciated.
    Thanks,
    Adam

  19. #19
    Team Savage 243LPR's Avatar
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    Re: 6-284 vs 6mm Rem AI

    Got in on the pre-ordrer at Gun Shack for a 6mm Ackley. Now just need to wait and start getting supplies.
    "An armed society is a polite society"
    "...shall not be infringed" What's the confusion?

  20. #20
    BWB
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    Re: 6-284 vs 6mm Rem AI

    Has anyone fire formed 257 Roberts bass for the 6mm AI?

  21. #21
    Super Moderator Blue Avenger's Avatar
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    Re: 6-284 vs 6mm Rem AI

    Quote Originally Posted by BWB
    Has anyone fire formed 257 Roberts bass for the 6mm AI?
    NO, why? is it better for any reason over the 6mm brass?
    .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, 28 nosler, .416 Taylor

  22. #22
    Super Moderator Blue Avenger's Avatar
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    Re: 6-284 vs 6mm Rem AI

    OK
    Looked it up. And basically the 257 is the same dia, just longer at all shoulder points, so the 6AI die would be making new base to shoulder lengths. See where it might work.
    .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, 28 nosler, .416 Taylor

  23. #23
    BWB
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    Re: 6-284 vs 6mm Rem AI

    I've heard the 257 Roberts brass will last longer, just wondering if anyone has tried it. My plan is to start with the 257 Roberts brass since I'm buying new anyway.

  24. #24
    Torg
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    Re: 6-284 vs 6mm Rem AI


  25. #25
    Ray Gunter
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    Re: 6-284 vs 6mm Rem AI

    Quote Originally Posted by BWB
    I've heard the 257 Roberts brass will last longer, just wondering if anyone has tried it. My plan is to start with the 257 Roberts brass since I'm buying new anyway.
    Yes I am using 257 brass for my 6mmRemAI.
    I didn't have any 6mm and not any good brass in 7x57.
    So I used 257 and created a good tight false shoulder to fireform against.

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