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Thread: 270 Winchester advice

  1. #1

    270 Winchester advice

    Hi, I am considering a Tikka in 270 win, can anyone give me the lowdown on a 18" 1 in 10 twist barrel, using 100gn bullets...When i say the lowdown i mean flat shooting? FPS & effective ranges...I am thinking of clearing the cabinet a little and learning to love one rifle...I have 222. 243 and have had 30-06...So tell me about 270 as i know nothing about them really... Wiil be used for fallow, roe & fox...Cheers
    Last edited by sparko; 15-03-2012 at 21:35. Reason: Sic

  2. #2
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    18" is a bit short for a 270, i have a stock winchester m70 and it has a 24" factory barrel

  3. #3
    An 18" tube in 270 is going to be barky. Do you really need a barrel that short? You'll be pretty close to .243 ballistics with the combo you describe, but the 6mm bullet will have beter sectional density and BC.

  4. #4
    Have 222, 243, and 270, love my 270 for deer, love my 243 for foxing and never use my 222 anymore, don't like using the 270 on foxes, not for the overkill factor just the 243 does the job better and the reverse with deer, with the 270 it just does what it says on the tin, puts them on their arse, a lovely accurate rifle (tikka lite synthetic) wouldn't change it,but wouldn't be without 243 either!

  5. #5
    well on the basis that "they" reckon you lose 50-100fps per inch off the barrel you would be losing around 2-400fps off factory ammo of 3100fps.


    doubt you would notice a huge change in ballistics/trajectory for that small amount.


    I load my 270 for a rough guess 2800fps MV with 130gn.
    Same POI as factory Norma at 3100





    Quote Originally Posted by Windknot View Post
    An 18" tube in 270 is going to be barky. Do you really need a barrel that short? You'll be pretty close to .243 ballistics with the combo you describe, but the 6mm bullet will have beter sectional density and BC.
    not sure you will get better BC with a .243
    Only ammo I have in 243 that comes close to the BC of the .270 130 and 150gn bullets are some super slippery Berger Boat Tail match/varmint


    Speer 85gn HP 6mm - 0.404
    Berger 90gn 6mm BTBT - 0.410
    Hornady Interlock 100gn SPBT 6mm - 0.405


    Hornady Interlock SPBT 130gn .270 - 0.405
    Swift BTBT 140gn .270 - 0.450
    Nosler BTBT 140gn .270 - 0.456
    Nosler Partition 150gn .270 - 0.465

  6. #6
    I Shoot 100gr Hornady soft points over 55.5gr of H380 in my Tikka 270.
    The rifle has its factory barrel which I think is 23 3/4" and crono's an average of 3642fps with a max spread of 22fps
    It is very accurate and hits hard with surprisingly little meat damage as long as you don't pin them in the shoulder and can be relied to exit chest shots even on big rutting stags.

  7. #7
    I assume as it's so short the idea is to moderate it?

    As mentioned the muzzle blast from a .270 with such a short barrel will be very noticeable as will muzzle flash especially in low light. I have a BSA CF2 Stutzen which has a 20" barrel and the muzzle flash is quite something. In fact when I hand loaded for it I switch to a faster burning powder which helped reduce the fire ball at the muzzle quite a bit.

    I always wondered why they chose the chamber a rifle with such a short barrel in 270 Winchester even another 2" in length seems to help as I have not noticed such blast and flash with a 22" barrelled rifle.

    Sorry but I do feel that with a 18" barrel you would be better of with a different cartridge/chambering.

  8. #8
    Well, he did say he'd like to use 100 gn bullets in the .270, at that weight the 100gn 6mm will have a higher BC.

    Quote Originally Posted by bewsher500 View Post
    well on the basis that "they" reckon you lose 50-100fps per inch off the barrel you would be losing around 2-400fps off factory ammo of 3100fps.


    doubt you would notice a huge change in ballistics/trajectory for that small amount.


    I load my 270 for a rough guess 2800fps MV with 130gn.
    Same POI as factory Norma at 3100







    not sure you will get better BC with a .243
    Only ammo I have in 243 that comes close to the BC of the .270 130 and 150gn bullets are some super slippery Berger Boat Tail match/varmint


    Speer 85gn HP 6mm - 0.404
    Berger 90gn 6mm BTBT - 0.410
    Hornady Interlock 100gn SPBT 6mm - 0.405


    Hornady Interlock SPBT 130gn .270 - 0.405
    Swift BTBT 140gn .270 - 0.450
    Nosler BTBT 140gn .270 - 0.456
    Nosler Partition 150gn .270 - 0.465

  9. #9
    Quote Originally Posted by Windknot View Post
    Well, he did say he'd like to use 100 gn bullets in the .270, at that weight the 100gn 6mm will have a higher BC.
    ah, touche.
    didnt see that part!

    I have some 90gn and 100gn HP .270 rounds that are very wobbly due to the short length.
    Seating them makes for a ridiculous looking cartridge!
    BC of 0.275 and 0.225 respectively. sure a SP or BT round might be more stable but not much

    not used them in anger but apparently devastating on foxes/crows!

  10. #10
    I've been looking at the CZ550 FS with a 20.5" barrel and 1 in 10 rate of twist I think. Is that a daft setup too?

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