Page 1 of 2 12 LastLast
Results 1 to 10 of 13

Thread: 22-250 twist rate

  1. #1

    22-250 twist rate

    Sorry for my ignorance, does anyone know what the twist rate would be on my new Sako 85 in 22-250, and whether it would suit 50 or 55 grain bullets best. Been out tonight to try some 50 grains and with only 34.5 grains of H4895 I had 3 touching shots.

  2. #2
    Quote Originally Posted by Wylyetom View Post
    Sorry for my ignorance, does anyone know what the twist rate would be on my new Sako 85 in 22-250, and whether it would suit 50 or 55 grain bullets best. Been out tonight to try some 50 grains and with only 34.5 grains of H4895 I had 3 touching shots.
    Technically, stabilization is based on bullet length, not weight, but in most cases what 'works' with a 50 grain will 'work' with a 55 grain to the degree that a given rifle likes the bullet of choice.~Muir

  3. #3
    Quote Originally Posted by Wylyetom View Post
    Sorry for my ignorance, does anyone know what the twist rate would be on my new Sako 85 in 22-250, and whether it would suit 50 or 55 grain bullets best. Been out tonight to try some 50 grains and with only 34.5 grains of H4895 I had 3 touching shots.
    If you have cleaning rod, why don't you measure your rifle's twist rate yourself? Although your rifle will have an advertised twist rate, mistakes can happen, so it's easy to measure yourself and confirm what you actually have.

    http://www.accurateshooter.com/techn...el-twist-rate/

    Regards

    JCS

  4. #4

  5. #5
    SD Regular
    Join Date
    Nov 2010
    Location
    Herefordshire, Hampshire or Essex
    Posts
    2,743
    Suspect there is another node of accuracy around 36gr if you're looking to bump the speed. As said 50 and 55 will stabilise fine - it's the heavier (and longer!) bullets (65gr+) that respond better to the faster twist
    Nooooooooooooobody expects the Spanish Inquisition!! Our main weapon is.........

  6. #6
    You may find that you need a faster twist for 55gn boat-tail plastic tip bullets, they will be marginal in a 1:14.
    A young man who isn't a socialist hasn't got a heart; an old man who is a socialist hasn't got a head.
    I have summat for sale; here's the M̶i̶d̶w̶a̶y̶ Brownells UK price... effin jokers.
    "The .30-'06 is unstable at close range" - Ahahahahhahh!


  7. #7
    Strange that the 22 CF who has the power to push heavy bullets, mostly has a very slow twist.

  8. #8
    Quote Originally Posted by Hales Smut View Post
    Strange that the 22 CF who has the power to push heavy bullets, mostly has a very slow twist.
    The Sako 75/85 series in .22-250 have exactly the same barrel fitted as the Tikka M590/M595/T3 series, so it’s the same 1:14 twist. It’s the standard for almost every other .22-250, except for the Savage Arms 1:12” I’m told.

    It’s a varmint cartridge originally designed for flat-based SP, and this twist-rate works with all of these bullets in the 40gr – 63gr range. The industry turns out the configuration that will do the job. No mystery to me.
    If I'm going to be accused of it then it's just as well I did it.

  9. #9
    14 twist. Should work well with pointed 55gners.

  10. #10
    Quote Originally Posted by Sinistral View Post
    The Sako 75/85 series in .22-250 have exactly the same barrel fitted as the Tikka M590/M595/T3 series, so it’s the same 1:14 twist. It’s the standard for almost every other .22-250, except for the Savage Arms 1:12” I’m told.

    It’s a varmint cartridge originally designed for flat-based SP, and this twist-rate works with all of these bullets in the 40gr – 63gr range. The industry turns out the configuration that will do the job. No mystery to me.
    Agree, no mystery. But this case has the potential to push 70-90 grain bullets. But it seems hard to find a factory 22-250 with 1-7 or 1-8 twists.

Similar Threads

  1. twist rate
    By w0rks2much in forum Cleaning, Gunsmithing and Equipment Care
    Replies: 6
    Last Post: 06-08-2015, 21:42
  2. 260 REM twist rate
    By Matt234 in forum Rifles & Calibres
    Replies: 7
    Last Post: 17-06-2015, 16:43
  3. .223 twist-rate?
    By Dalua in forum Rifles & Calibres
    Replies: 19
    Last Post: 17-01-2014, 10:38
  4. Twist Rates - how to find what your twist rate is:
    By deeangeo in forum Ammunition, Reloading & Ballistics
    Replies: 0
    Last Post: 20-08-2011, 06:29
  5. twist rate
    By david1976 in forum Ammunition, Reloading & Ballistics
    Replies: 2
    Last Post: 28-05-2010, 06:00

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •