close
Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Rifles, Reloading, Optics, Equipment > Rifles, Bullets, Barrels & Ballistics

Rifles, Bullets, Barrels & Ballistics Applied Ballistics

Reply

Barrel twists on your fav .338 long range gun

LinkBack Thread Tools Display Modes
  #1  
Unread 11-18-2003, 05:00 PM
Gold Member
 
Join Date: Sep 2003
Location: Nebraska
Posts: 810
Barrel twists on your fav .338 long range gun

Im currently working on a project by necking the 505 down to .338 cal. I'm wondering what twists your longrange guns have, bbl length and the speeds you run with the Sierra 300gr bullets. I want to compute the twist i will need for this bullet, the new case should be capable of launching the bullet at speeds over 3500fps. I need to have a twist that will not over spin the bullet so it will stabilize out at 1000yds or farther. I have a pic of the formed case if any one wants to see it i can email it to you. It most likely will have a 35deg shoulder.

DC did a workup on the wildcat and it looks very promising!! [img]images/icons/smile.gif[/img]
__________________
www.cowboy-dave.com

"Let the good times roll"
Reply With Quote
  •   #2  
    Unread 11-18-2003, 05:08 PM
    Platinum Member
     
    Join Date: May 2001
    Location: Pennsylvania
    Posts: 1,757
    Re: Barrel twists on your fav .338 long range gun

    My two 338/416 IMP has a 10 twist.

    The 37" barrel on the one has produced 3310 FPS using the 300 Gr Sierra MK.

    The case has a 35 degree shoulder.

    Later
    DC
    __________________
    Darryl Cassel
    Reply With Quote

      #3  
    Unread 11-18-2003, 05:59 PM
    Bronze Member
     
    Join Date: Nov 2003
    Location: Northern Ontario, CANADA
    Posts: 44
    Re: Barrel twists on your fav .338 long range gun

    Black Diamond try this email address that a friend just gave me on the same subject. Loadammo.com
    __________________
    Jerry
    Reply With Quote
      #4  
    Unread 11-18-2003, 06:13 PM
    Gold Member
     
    Join Date: May 2001
    Location: Urich, MO
    Posts: 838
    Re: Barrel twists on your fav .338 long range gun

    I don't feel you can "over spin" a bullet as I have shot several fast twist guns with light bullets and had no problem. However I tend to go with the slowest twist I can get away with. For example- 1 in 11 for 300 Win Mags up to 210 gr bullets. Boots Obermeyer uses a 13 for 190.
    You can literally spin the jacket off in too fast on light made bullets.
    To answer your question a 10 will work great or maybe a little slower. Remember, the faster you push the bullet, you can get away with a slower twist.
    __________________
    Chris Matthews
    www.longshotriflesllc.com
    Reply With Quote
      #5  
    Unread 11-18-2003, 06:24 PM
    Gold Member
     
    Join Date: Sep 2003
    Location: Nebraska
    Posts: 810
    Re: Barrel twists on your fav .338 long range gun

    Thanks Thunder, ill check it out.

    Thanks Chris! I want to get it right the first time,,$$$$$
    __________________
    www.cowboy-dave.com

    "Let the good times roll"
    Reply With Quote
      #6  
    Unread 11-18-2003, 06:26 PM
    Silver Member
     
    Join Date: Dec 2001
    Location: bluefield,va,us
    Posts: 337
    Re: Barrel twists on your fav .338 long range gun

    338/416 IMP what head size is it.is it the same as the 338 RUM,thanks,keith
    __________________
    keith
    Reply With Quote
      #7  
    Unread 11-18-2003, 08:01 PM
    Silver Member
     
    Join Date: Dec 2002
    Location: Finland
    Posts: 179
    Re: Barrel twists on your fav .338 long range gun

    According to almost everyone here,the twist for .338 300 MK:s is 10". Man,I was more than happy to find out that my TRG-S has a 10" twist (instead of the still advertised 12"), otherwise Id stayed with 250 grainers.

    Very low ES,some bedding things to fix now but my first shot is always where its supposed to be with the MK:s and the deer are out there now...

    The Greenhill Formula gives you 9.95" for that combo too.
    Reply With Quote
    Reply

    Bookmarks

    Thread Tools
    Display Modes


    Similar Threads for: Barrel twists on your fav .338 long range gun
    Thread Thread Starter Forum Replies Last Post
    Long range with a sporter barrel ? Tang Long Range Hunting & Shooting 21 01-25-2009 04:22 PM
    Timing a Barrel, how much impact in Long Range? AJ Peacock Gunsmithing 16 12-30-2007 10:54 AM
    Long range barrel profile LRHWAL Rifles, Bullets, Barrels & Ballistics 39 02-26-2006 09:44 PM
    243 & 1-9.25" barrel twist at long range???? 270yotekiller Rifles, Bullets, Barrels & Ballistics 6 12-29-2005 09:01 PM
    Gain Twists Tim Behle Rifles, Bullets, Barrels & Ballistics 0 04-11-2002 09:45 PM


    All times are GMT -5. The time now is 06:40 PM.


    Powered by vBulletin ©2000 - 2017, Jelsoft Enterprises Ltd.
    Content Management Powered by vBadvanced CMPS
    All content ©2010-2015 Long Range Hunting, LLC