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7mm ultra

 
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  #1  
Old 02-06-2007, 12:54 PM
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7mm ultra

I am planning a build soon, and I need to know what twist rate would suffice for most 7mm bullets over 175 grains @ 2900-3100 FPS (especially the 180 berger and the 200 wildcat...).... thanks, sharpshooter
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Old 02-06-2007, 01:15 PM
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Re: 7mm ultra

I think Kirby's useing a 1-8.7 twist for the 200 grainers.

Tim
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Old 02-06-2007, 01:18 PM
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Re: 7mm ultra

Ok, I was thinking a 1-8 twist 3 groove Pac-nor tube for my savage ultra mag... Thanks for the quick response!
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Old 02-06-2007, 01:20 PM
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Re: 7mm ultra

Yup, its the Rock thin land 1 in 8.7 5R.
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Old 02-06-2007, 08:08 PM
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Re: 7mm ultra

He is using a 1-9 for the 7mm AM's in Lilja....

I have a 1-9 twist 7mm STW that I am going to try the 200 grainer in soon.
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Old 02-06-2007, 08:30 PM
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Re: 7mm ultra

yup, thats whats goin on mine!
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Old 02-06-2007, 08:49 PM
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Re: 7mm ultra

Cool, I am trying to convince myself to go with a rock barrel, but they don't pre-fit barrels, and I don't have a lathe lol. So does anybody know where the best place is to have a blank chambered and threaded for my savage action? (I can install and headspace myself...)
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