Remington 660 6mm load help

Discussion in 'Long Range Hunting & Shooting' started by BMF6.5, Oct 24, 2018.

  1. BMF6.5

    BMF6.5 Member

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    All I’m am looking for load data help.
    Working with a factory Remington 660 in 6mm Remington currently using RL19 at all powder charge ranges with a 85grn TSX I am still not getting the accuracy that I’d like to see out of this unit.

    Please help with any suggestions the unit has been floated and bedded.

    Thanks for any help
     
  2. HARPERC

    HARPERC Well-Known Member

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    What twist came in those?
     
  3. BMF6.5

    BMF6.5 Member

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    I’m not 100% sure but I’m planning on checking that tonight.
     
  4. WildBillG

    WildBillG Well-Known Member

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    If it says 6mm Rem it was the faster twist the 244 was the slower twist. There are several powders you could use in my 244 Rl19 worked great with 70 Nosler Ballistic tips. Seeing as you are using Barnes tsx you may just need to seat them a little deeper.
     
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  5. Roy39A

    Roy39A Member

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    I believe that it early 6mm Remingtons were 1/9 twist.
    My sons 6mm Mohawk likes the 95 grain Nosler ballistics tip with Imr 4350.
    It also loves the Sierra 60 grain hp with H-4895.
     
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  6. Jburr

    Jburr Member

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    AA 2700 and N550 have worked really well with 85gr tsx and 90 Nosler BT in my sons Rem 742 6mm. Reloader 22 Has given me great accuracy and speed in my 6mm AI
     
    Last edited: Oct 25, 2018
  7. BMF6.5

    BMF6.5 Member

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    Thanks to all!!! This is the info I was looking for.
     
  8. BMF6.5

    BMF6.5 Member

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    I’ll make some changes this weekend and update my findings for others.

    Thanks for all the help
     
  9. HARPERC

    HARPERC Well-Known Member

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    If it continues to struggle, and you wish to stick with mono’s try the Hammers.
     
  10. WildRose

    WildRose Well-Known Member

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    Better double check that. They were built as varmint rifles and intended only to shoot the lighter bullets.

    Use a cleaning rod.

    Run int in about an inch and mark it.

    Run it down a foot marking each revolution as you go or just put a dot every inch and count the rotations for a foot.

    Remington has been notorious for slow twists crippling great cartridges and the further back you go the worse it was.
     
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  11. HARPERC

    HARPERC Well-Known Member

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    Even custom barrels occasionally fail to measure what was ordered. Until you've verified it first hand it belongs on the list of possible reasons a particular bullet doesn't work as expected
     
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  12. WildRose

    WildRose Well-Known Member

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    Good point. As easy as it is to measure why waste time and ammo guessing?
     
  13. just country

    just country Well-Known Member

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    morning, my 243AI and 6mmAI both the shoot the
    95gr. Berger VLD. I have changed to barnes bullets
    for availability. the 85gr.and 100gr. TTSX shoot
    very well. again depends on the twist. justme gbot tum
     
  14. Jburr

    Jburr Member

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    I mistyped in an earlier post I meant to say N550 not 560 edited my post to correct that