Welcome guest, is this your first visit? Create Account now to join.
  • Login:

Welcome to the NZ Hunting and Shooting Forums.

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed.

Alpine Black Watch


User Tag List

+ Reply to Thread
Results 1 to 12 of 12
Like Tree7Likes
  • 1 Post By R93
  • 1 Post By Spudattack
  • 1 Post By ebf
  • 1 Post By ishoot10s
  • 1 Post By Gunzrrr
  • 1 Post By R93
  • 1 Post By mucko

Thread: Twist Rate - is there a simple rule?

  1. #1
    Keep safe in the hills! Gunzrrr's Avatar
    Join Date
    May 2013
    Location
    Pokeno, home of the mallard
    Posts
    272

    Twist Rate - is there a simple rule?

    Hi everyone,
    I have a new Sauer 202 XT in .223 which I bought for fallow and goats & walk around varminting (& for my son to shoot). The twist rate is 1:9.5(ish) and I imagined I would shoot around 65gr. Given that twist rate - is there a 'typical' projectile weight that will suit the barrel or is it still best to buy 4-6 different brands/weights/models and see which one groups best.
    I'm not that precious with brands but do like Federal for my .204. Preferably I would like to find one brand and stick to it.
    Thoughts or advice ? ... cheers PJ

  2. #2
    R93
    R93 is offline
    Member R93's Avatar
    Join Date
    Feb 2012
    Location
    Westland NZ
    Posts
    14,716
    I would try a few different projectiles in the weights you want. You may also find heavier projectiles will still shoot better with a slower than recommended twist. Got a pic of the rifle??
    Gunzrrr likes this.
    Do what ya want! Ya will anyway.

  3. #3
    Numzane Spudattack's Avatar
    Join Date
    Aug 2012
    Location
    Whangarei
    Posts
    2,637
    Quote Originally Posted by Gunzrrr View Post
    Hi everyone,
    I have a new Sauer 202 XT
    Awesome rifle very jealous!
    Gunzrrr likes this.
    "Here's the deal I'm the best there is. Plain and simple. I wake up in the morning and I piss excellence."

  4. #4
    ebf
    ebf is offline
    The gnome returns ! ebf's Avatar
    Join Date
    Jun 2012
    Location
    Hutt Valley
    Posts
    5,004
    Have a play with this

    http://www.bergerbullets.com/litz/TwistRuleAlt.php

    Still pays to go shoot different bullets and see what works for real as opposed to the theory
    Gunzrrr likes this.
    Viva la Howa ! R.I.P. Toby
    Black rifles matter...

  5. #5
    Load....Action....Instant ....Watch and Shoot! ishoot10s's Avatar
    Join Date
    May 2012
    Location
    NW of the true capital...
    Posts
    1,368
    I've got a spreadsheet set up with Greenhills formula, which is this:

    Twist Rate = 150*(D/(L/D)) for velocities up to 2800 fps
    Twist Rate = 180*(D/(L/D)) for velocities over 2800 fps
    where D = bullet diameter in inches
    L = bullet length in inches

    A .223 69 grain Sierra Match king needs 10" or faster twist, so you should be quids in with a 65 grainer but, as has been suggested, you'll need to try a few variations before you find a pet load.
    Gunzrrr likes this.
    10MRT shooters do it 60 times, in two directions and at two speeds.

  6. #6
    Keep safe in the hills! Gunzrrr's Avatar
    Join Date
    May 2013
    Location
    Pokeno, home of the mallard
    Posts
    272
    Quote Originally Posted by R93 View Post
    I would try a few different projectiles in the weights you want. You may also find heavier projectiles will still shoot better with a slower than recommended twist. Got a pic of the rifle??
    Here it is ... thanks for the comments everyone !!
    Cheers PJ
    Name:  IMG_0151.jpg
Views: 617
Size:  39.7 KB
    Bryan likes this.

  7. #7
    Member sako75's Avatar
    Join Date
    Dec 2011
    Location
    Supercity
    Posts
    4,868
    Was that through Sportsway?

  8. #8
    Keep safe in the hills! Gunzrrr's Avatar
    Join Date
    May 2013
    Location
    Pokeno, home of the mallard
    Posts
    272
    Hey sako75
    Yes it was from Sportways. I've bought a number of firearms over the years from a number of different outlets. Bill MacLeod, now from HF Botany shaped my thinking in terms of the way I "invest" in my gun rack. Given your Forum name, I'm pleased to say that one of my favourite rifles is my Sako .308 Bavarian. However, I stopped looking at anything Beretta/Sako when Beretta NZ trashed the price and therefore my perceived value of their products. By that I mean that I invested $3500 in an Xtrema that was only worth $1490 less than 6 months later. I won't make that "investment" mistake again. The other outlet I like is Staeger Sports (forgive my spelling if I have it wrong). Those guys have experience, talents, views, opinions, products, etc, and a fabulous attitude to customer service!
    Each to their own eh? Isn't human behaviour fascinating ... cheers PJ

  9. #9
    R93
    R93 is offline
    Member R93's Avatar
    Join Date
    Feb 2012
    Location
    Westland NZ
    Posts
    14,716
    Have you got a better photo, mate? The one posted, for me, is small and hard to see.
    Gunzrrr likes this.
    Do what ya want! Ya will anyway.

  10. #10
    Keep safe in the hills! Gunzrrr's Avatar
    Join Date
    May 2013
    Location
    Pokeno, home of the mallard
    Posts
    272
    The reason it's a small photo is its a crap photo so I resized it. For a fab photo I need a fox draped over the stock and a hot busty zombie chic in the background ... and maybe a glass of NZ made Pinot Noir somewhere.
    I'll attempt to improve my photography skills and make another post. Maybe under the Varmint thread where I have my Ruger .17HMR and Kimber. Send me a private message and ill send you a bunch of photos.

  11. #11
    Member mucko's Avatar
    Join Date
    May 2012
    Location
    Tauranga
    Posts
    12,408
    JBM - Calculations - Stability have a play here as for your photo resizing try faststone photo resizer
    Gunzrrr likes this.

  12. #12
    Member sako75's Avatar
    Join Date
    Dec 2011
    Location
    Supercity
    Posts
    4,868
    Thanks Gunzrrr. I got my Sako there a few years back. Just about all my rifles I bought over the years came from there. Simon who works there just about sold me a Sauer when I was in there just to pass time while waiting to meet a customer down the road.
    My first rifle was a 6.5x55 about 20yrs ago

 

 

Similar Threads

  1. Hunting- one of life's simple pleasures
    By 7mmsaum in forum Hunting
    Replies: 25
    Last Post: 23-02-2014, 10:35 PM
  2. AR15 pending rule changes?
    By Gemini in forum Firearms, Optics and Accessories
    Replies: 186
    Last Post: 01-04-2013, 04:23 PM
  3. Simple wind calculation for 308 has anyone tried it?
    By steven in forum Reloading and Ballistics
    Replies: 3
    Last Post: 20-03-2013, 03:14 PM
  4. Twist rate 223 rem 700
    By Munsey in forum Firearms, Optics and Accessories
    Replies: 2
    Last Post: 25-12-2012, 08:03 PM
  5. Twist Rate for 223???
    By puku in forum Reloading and Ballistics
    Replies: 7
    Last Post: 16-08-2012, 06:38 PM

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
Welcome to NZ Hunting and Shooting Forums! We see you're new here, or arn't logged in. Create an account, and Login for full access including our FREE BUY and SELL section Register NOW!!