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Thread: New .270 cal cartridge from Winchester

  1. #1
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    New .270 cal cartridge from Winchester

    It seems like Winchester will e giving the .270 faithful a new short magnum cartridge in .277 calibre. The 6.8 Western is a slightly shorter case at 51.30 mm than the .270 WSM and designed to shoot 175 gn projectiles in a 1:8 twist barrel at 2840 Fps. Cartridges are loaded to 65 000 PSI.

    There are more details and diagrams at this link
    https://saami.org/wp-content/uploads...2020-11-01.pdf

  2. #2
    Member Micky Duck's Avatar
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    and where pray tell me are they intending to GET 175grn .277 cal projectiles from?????
    it would be far far far better if they talked nosler into poking a plastic tip into the 160grn partition that we all can use anyway.....
    Im trying really really hard to see why they decide this is good idea..... really hard.
    folks dribble on about how great a 280AI is but no one will suggest AI the std 270 win is good idea...... funny,same case and very similar projectile,sure there is better selection on .284 projectiles around...but there are some plenty good .277 ones.
    mind you,having some 1;8 twist barrels around the show would give interesting options....
    grandpamac likes this.

  3. #3
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    This sounds cool.



    Sent from my CPH1701 using Tapatalk

  4. #4
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    A take on 6.8 PRC would have been better

  5. #5
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    I'd guess that Winchester must be talking to someone who makes high BC pills presently. More to follow i guess.

  6. #6
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    Another product of the marketing arm of a gun maker - if you build it , they will buy it .

    Aint no gap in the calibre/ballistic chart at the 270 point that I can see - just a gimmick to sell more product.
    RUMPY likes this.
    Be more involved and less impressed.

  7. #7
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    Just what I have always been waiting for.....

    a .270 Creedmoor.....

    Cheers
    Phil

  8. #8
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    it will complement my 7.62 Creedmoor

    Cheers
    Phil
    flock and grandpamac like this.

  9. #9
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    Greetings All,
    The curmudgeon here. The 6.8 Western or the .270 Winchester slightly shorter magnum as I will call it will give little more than a standard .270 Win with a fast twist barrel. Speer got slightly under 2,800 fps with their 170 grain round nose in their no 9 manual. Interesting that the case has been shortened to about the same length as the 7mm SAUM. Probably to allow the long pointy projectiles to be seated in short actions. We got by for about 50 years with only two .270 calibre cartridges but I have lost count of how many have popped up in the last 20 years or so. Still, I suppose that new sells for a little while at least.
    Regards Grumpamac.
    Micky Duck and dannyb like this.

  10. #10
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    Quote Originally Posted by grandpamac View Post
    Greetings All,
    The curmudgeon here. The 6.8 Western or the .270 Winchester slightly shorter magnum as I will call it will give little more than a standard .270 Win with a fast twist barrel. Speer got slightly under 2,800 fps with their 170 grain round nose in their no 9 manual. Interesting that the case has been shortened to about the same length as the 7mm SAUM. Probably to allow the long pointy projectiles to be seated in short actions. We got by for about 50 years with only two .270 calibre cartridges but I have lost count of how many have popped up in the last 20 years or so. Still, I suppose that new sells for a little while at least.
    Regards Grumpamac.
    Grandpamac time marches on

    The original 270 is five hundred years old and so are the rifles chambered in it. Those old rifles need reduced factory loads. So the original has had its wings clipped.

    In real numbers and in practice in the field, a teency weency little itty bitty 6.5 case not much bigger than a 22-250 case will send a 140gr pill downrange and leave the 270 for dead ballistically. The rather enormous 270 case with all that recoil with 130gr pill is actually quite gutless by comparison.

    People have worked out that a light pill with a low BC doing 3200ft/sec is actually quite feeble compared to a heavy, high BC pill doing 2800ft/sec and the barrel lasts longer.

    The old 270s performance was largely cosmetic.

    Sent from my CPH1701 using Tapatalk

  11. #11
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    Quote Originally Posted by Micky Duck View Post
    and where pray tell me are they intending to GET 175grn .277 cal projectiles from?????
    it would be far far far better if they talked nosler into poking a plastic tip into the 160grn partition that we all can use anyway.....
    Im trying really really hard to see why they decide this is good idea..... really hard.
    folks dribble on about how great a 280AI is but no one will suggest AI the std 270 win is good idea...... funny,same case and very similar projectile,sure there is better selection on .284 projectiles around...but there are some plenty good .277 ones.
    mind you,having some 1;8 twist barrels around the show would give interesting options....

    Dont Berger do a 175 vld? Elite hunter maybe I remember I looked into them for wsm but twist was wrong

  12. #12
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    Isnt that one of the big issues? The twist rate?
    A couple of heavier projectiles but vast majority of 270s twist is marginal for them
    Ice found the same thing researching for the 264win mag
    Standard is 1-9 but the later long range projectiles need quicker which ironically slower calibres like the creedmore do have the quicker twist which gives makes them ballistically better a long way out even though they are up to 300fps slower

  13. #13
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    Greetings All,
    At least the 6.8 mm Western has a twist suitable for high BC projectiles. For far too long US cartridges have been kneecapped with slow twists. A case could be made for 8 inches being the standard twist for all calibres up to and including .30 calibre.
    Regards Grandpamac.
    Tussock likes this.

  14. #14
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    BUT when you up the twist AND the speed...you need to make projectiles harder or they blow apart...and when speed decreases they no longer expand properly...
    catch 22
    oh and SOME of us still use those wonderful speer 170grn round noses...or at least I will when have live poohseventy again....
    csmiffy and dannyb like this.

  15. #15
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    Quote Originally Posted by grandpamac View Post
    Greetings All,
    At least the 6.8 mm Western has a twist suitable for high BC projectiles. For far too long US cartridges have been kneecapped with slow twists. A case could be made for 8 inches being the standard twist for all calibres up to and including .30 calibre.
    Regards Grandpamac.
    I agree 1:8 twist is a sweet spot for twist rate. Todd Hodnett from Accuracy First stated he uses this in his rifle builds up to and including 308w.
    grandpamac likes this.
    BC doesn't matter, until you need to dial

 

 

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