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

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 07:07 AM.

Powered by vBulletin ©2000 - 2015, Jelsoft Enterprises Ltd.
Content Management Powered by vBadvanced CMPS
All content ©2010-2014 Long Range Hunting, LLC