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Twist rate and bullet stability at 900 yards

 
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  #15  
Old 10-26-2003, 01:07 PM
dwm dwm is offline
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Re: Twist rate and bullet stability at 900 yards

Darryl, do you think a 7mm RUM (28 in barrel) with an 11 twist would be able to stablize a 180 grain Berger?

Len, how long is the barrel on the 7mm Dakota? What is the Dakota case capacity? Is it between the WSM and RUM?

Doug
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  #16  
Old 10-26-2003, 01:41 PM
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Re: Twist rate and bullet stability at 900 yards

DWM

I think you would need the 9 twist for the 180 gr.
That's the twists I have had in all my 7mm 30" barreled longrange hunting rifles.

later
DC
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  #17  
Old 10-26-2003, 01:42 PM
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Re: Twist rate and bullet stability at 900 yards

Darryl,

I have some 180 JLKs, would these stablize in a 9.5 twist in my Sendero?

[img]images/icons/confused.gif[/img] [img]images/icons/confused.gif[/img] [img]images/icons/confused.gif[/img]
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  #18  
Old 10-26-2003, 03:52 PM
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Re: Twist rate and bullet stability at 900 yards

DWM

Length is 32

77 grains of H1000 with the Cauterucio 176, don't know the case capacity.
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  #19  
Old 10-26-2003, 04:31 PM
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Re: Twist rate and bullet stability at 900 yards

Hostler

I would think they would. Give them a try if you have them on hand.
My 180gr and 186gr did in a 30" barrel

Later
DC
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  #20  
Old 10-26-2003, 09:58 PM
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Re: Twist rate and bullet stability at 900 yards

Thanks, I'll give them a shot, sorry about that. [img]images/icons/grin.gif[/img] [img]images/icons/grin.gif[/img] [img]images/icons/grin.gif[/img]
db
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  #21  
Old 10-27-2003, 12:09 AM
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Re: Twist rate and bullet stability at 900 yards

Len

If your after high BC, look at the 180 Gr Berger or the 180 gr JLK.

This might just be the answer for you.
Their BCs were in the .7 range.

I had some 187gr 7mm Cattarucios years ago that really held up well at extended range in my 7/300 Weatherbys.
Same jackets as the Sierra MK.

You don't need excessive speed with a 180 gr plus grain 7 mm match style bullet.
Later
DC

PS---If I had a 7mm RUM or the 7mm/378 Weatherby, the 180 gr bullet would be my main bullet of choice.

[ 10-26-2003: Message edited by: Darryl Cassel ]
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