6.5-06 or 6.5 - 284

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by coupalr, Dec 27, 2006.

  1. coupalr

    coupalr Well-Known Member

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    I want to build a rifle for F-class and my own personal longrange target shooting fun. Should I build a 6.5-06 or a 6.5 -284. I see from some load data the the 06 will get me about 200fps over the 284 with 160gr bullets, so I am leaning toward the 06.

    What twist should I go with to shoot these heavy bullets? will 1-8 do it?
     
  2. Varmint Hunter

    Varmint Hunter Well-Known Member

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    Benchrest shooters are using the 6.5x284 in LARGE numbers. You rarely see anyone using the 6.5-06 competitively. There must be a reason.

    I went 6.5x284 in my newest heavy varmint rig and have been very happy with the results. However, groundhogs would probably prefered that I didn't. /ubbthreads/images/graemlins/grin.gif
     

  3. coupalr

    coupalr Well-Known Member

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    After more research they look almost identical powder volume and efficiency wise and with the 6.5-284 being more popular I think I will follow the herd. But what twist to shoot 140gr and up to 165gr bullets?
     
  4. Varmint Hunter

    Varmint Hunter Well-Known Member

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    I have an 8 twist and shoot 139gr - 142gr bullets almost exclusively. I've had good results with Sierra - Lapua & A-Max bullets. The Berger 140 VLD's look good but I haven't tried them yet.

    Not sure about the proper twist for bullets heavier than 142gr in the 6.5's.
     
  5. BountyHunter

    BountyHunter Writers Guild

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    I shot a 6.5-06 AI for four years in comp. It won more than its share, and several good shooters are using them too.

    Biggest reason people like the 6.5-284 is no fireforming and short vs long case.

    However, the 6.5-06 is not the barrel burner that the 6.5-284 is. Most competitive 6.5-284s last 700-no more than 1000 rds and still competetive.

    Think for fclass I would look at the straight 6.5-06 in 8 twist or better yet, the 6-47 in 8 twist. More FPS, good BC bullets, low recoil and seems to be very good barrel life unlike the 6.5-284.

    BH
     
  6. Ridge Runner

    Ridge Runner Well-Known Member

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    yep 8 twist, the old 155 smk's done well with it.
    JS
     
  7. uncleB

    uncleB Well-Known Member

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    [ QUOTE ]
    yep 8 twist, the old 155 smk's done well with it.
    JS

    [/ QUOTE ]
    Last time I checked (30seconds ago)Sierra's heaviest SMK in 6.5 (.264) was a 142gr. if they did make a 155SMK it would need faster than a 1-8" twist, or if you are talking about a 30cal 155gr SMk (that they do make) a 1-8" twist is too fast. very confusing.
    UB
     
  8. goodgrouper

    goodgrouper Well-Known Member

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    .
    [ QUOTE ]
    However, the 6.5-06 is not the barrel burner that the 6.5-284 is. Most competitive 6.5-284s last 700-no more than 1000 rds and still competetive

    [/ QUOTE ]


    Curious as to why you would say this? The 6.5-06 uses more powder than the 6.5-.284. My 284 lasted for about 1100 rounds before I had to do something about it. And a friend of mine's 6.5-06 was done at about 1000 rounds.
     
  9. goodgrouper

    goodgrouper Well-Known Member

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    Sierra did make a 155 grain MK for the 6.5mm but discontinued it last year or the year before because it was a dog and they didn't sell many. It required an 8" twist if memory serves but it actually had a lower bc than the 142!!
     
  10. James Jones

    James Jones Well-Known Member

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    Thats right GG the 155gr 6.5mm SMK was a dog and had a very low BC compaired to the lighter bullets

    Both the 6.5-06 and 6.5-284 can have accurate barrel lfe past 1000 rounds if the barrel is cared for properly. the 06 does have wee bit more case capacity than the 284 which would offer a wee bit more velocity. My vote goes to the 6.5-06 Ackley improved , you'll get better velocity with the heavier pill you mentioned which I assume will be from Wildcat bullets or some other custom maker , and it will probably feed better even with the steep shoulder. Unless you want to step up to the mag cases this is about the best your gonna get unless you want a Gibbs case which will put you into magnum velocity range with less powder.

    I ve got a 27" 1-8 twist Lilja 3 groove thats chambered in 260 , I plan to shoot the 140 A-max , 140 Berger and 141gr Cauterucio bullets to see what will give the best accuracy. Any of these pills out of this little case will get you into the competive ranks without excessive recoil , barrel wear and a great supply of good reloading componets , its easy to make fit in a short action and is inherantly accurate like its big brother the 308. If things don't work out like I want I'll ream it to 6.5-284 and if that don't work I'll ream it to 6.5 WSM !!! From all the reports I've seen and heard the 140 class match bullets don't like being pushed to much past 3000fps then accuracy suffers.

    Another great round would be the 6 XC or the 243 Ai chambered in a barrel with a 1-7 twist to shoot the 115gr bullets.
     
  11. Ridge Runner

    Ridge Runner Well-Known Member

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    uncleb, sierra discontinued the 155 smk some time ago, an article written by daryl cassel in "The Varmint Hunter Magazine"/Jan 1996, States how daryl placed top 4 in 4 sporter class 1k matches shooting a 6.5 Gibbs 1/8 and 155 gr smk's.
    JS
     
  12. blygy

    blygy Well-Known Member

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    6mm..

    I'm building a 6.5X300 Mag right now.. Talked to Richard @ Wildcat.. He said 1-8 will get you up to 150 Max. 1-7.5 will shoot the heavies he said..

    Blygy
     
  13. Alan Griffith

    Alan Griffith Well-Known Member

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