Long Range Hunting Online Magazine

Go Back   Long Range Hunting Online Magazine > Chatting and General Stuff > General Discussion

General Discussion Must wear red or OD green socks to participate. I can't see your socks, please be honest.


7mm-08 Twist Question

LinkBack Thread Tools Display Modes
Unread 02-23-2011, 08:56 PM
Junior Member
Join Date: Nov 2010
Posts: 3
7mm-08 Twist Question

I am building a 7mm-08 rifle and need some help with twist rate. I need to say that this will not be a long range rifle. This will be a 100-300 yard rifle with a Brux barrel and Predator action. It will be 21" long with a #6 contour.

I will never shoot a bullet heavier than 140 grains (I have other guns for bigger bullets). I will primarily shoot the Barnes 120 grain ttsx bullets (1.217 inches) and expect to get about 2850fps with the 21" barrel. I might shoot the 140 Barnes ttsx bullets which will be around 1.325 inches in length. Both of these bullets are slightly longer than similar weight bullets from other brands. If I shoot the 140's, I expect 2700 - 2750 fps.

I don't want to spin these bullets to fast and possibly affect accuracy. I also might pick up a little speed (not a lot, but maybe a bit) with a slower twist. I was thinking a 1:9.5 twist for this gun, but as I plug it into calculators (JBM Ballistics), it appears a 1:10 would keep the bullet stabilized (it actually says 1:11 would just barely stabilize the bullet, but not the 140 Barnes).

Anyone out there have some advice for me on this build? It would be greatly appreciated!
Reply With Quote
  •   #2  
    Unread 02-27-2011, 09:44 AM
    Junior Member
    Join Date: Jul 2008
    Posts: 12
    Re: 7mm-08 Twist Question

    I have a Ruger MKII 7-08 with 1:9.5 factory twist. I am working up a load with the Barnes 140gr TTSX and getting good accuracy @ 100yds for an Elk hunt. I need to do some tweeking but expect good/excellent accuracy out to 300-400 yds if I do my part. Hope this helps.

    Reply With Quote



    Thread Tools
    Display Modes

    Similar Threads for: 7mm-08 Twist Question
    Thread Thread Starter Forum Replies Last Post
    Question on 1 in 9 twist in .223 Strokerace_dave Rifles, Bullets, Barrels & Ballistics 3 06-19-2009 11:46 AM
    Twist question Ksmirk Gunsmithing 2 07-31-2008 08:34 PM
    Twist question? SamSpade Rifles, Bullets, Barrels & Ballistics 11 06-04-2006 06:49 PM
    25-06 twist question. ol mike Rifles, Bullets, Barrels & Ballistics 7 06-01-2006 09:07 AM
    Twist Question dakor Rifles, Bullets, Barrels & Ballistics 7 09-20-2004 07:13 PM

    All times are GMT -5. The time now is 03:01 PM.

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