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6.5 Twist

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Unread 11-01-2003, 09:32 PM
Junior Member
Join Date: Oct 2003
Location: Shelby N.C.
Posts: 7
6.5 Twist

What would be the best twist for a bullet weighing from 140 sierra,s to maybe 147 C. River grain bullet?
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Unread 11-02-2003, 07:17 AM
Gold Member
Join Date: May 2001
Location: Urich, MO
Posts: 838
Re: 6.5 Twist

Need 1-8 twist.
Chris Matthews
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Unread 11-05-2003, 07:50 PM
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Join Date: May 2001
Location: NC
Posts: 352
Re: 6.5 Twist

I've fired Sierra 142s MK, Sierra 140s MK, Lapua 139s, and Hornady 140gr A-Maxs through 2 seperate 9" twist barrels without a problem. And the one barrel did a whole bunch of winning at 1K BR matches. Haven't fired them in extreme cold weather though. About 30-40F is the lowest temp I've fired them in.
The 140gr Sierra in a 9" twist is good as low of temperature as you can stand. I've fired them with snow on the ground and the temp was %%^$%^ cold without a problem.
The Clinch River 147s work great in 8" and 8.5" twists by actual firing and hopefully will get to try them in my good 9 twist barrel this weekend. But it's going to be close according to calculations. We'll see.

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Unread 11-05-2003, 09:30 PM
Silver Member
Join Date: Dec 2002
Location: Bridgeville, PA
Posts: 127
Re: 6.5 Twist

my 6.5 WSM's got 9" twist and the 6.5x284's got 8" twist.
What velocity are u going to drive the C-Rivers?

[ 11-05-2003: Message edited by: mbianchini ]
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Unread 11-06-2003, 04:34 PM
Silver Member
Join Date: Jan 2003
Location: NE Ohio
Posts: 112
Re: 6.5 Twist

I've got a three groove Pac-Nor barrel chambered for 264 Win. Mag. with an 8" twist. Shoots the 140 SMK's great at just over 3000 fps. Not the most efficient cartridge in the world, but the dies were only $40. How many rounds of 6.5-284 would I have to fire in order to save $200 in powder to cover the extra expense of the dies????

That's my story and I'm stickin to it!!!!!!

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Unread 05-24-2009, 09:58 PM
Bronze Member
Join Date: Feb 2009
Location: land of Oz
Posts: 38
Re: 6.5 Twist

8:1 twist rate
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Unread 05-26-2009, 04:42 AM
Platinum Member
Join Date: Feb 2008
Location: IOWA
Posts: 1,943
Re: 6.5 Twist

You have gotten good advise. Go with a 1:8 twist.
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