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7mm rem mag and 180gr vld?

 
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  #1  
Old 12-12-2008, 02:21 PM
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7mm rem mag and 180gr vld?

I have a wheatherby in 7mmRem.mag with a 1:9 1/2 twist. I want to shot the 180gr vld but berger recommends a 1:9 or faster twist.My rifle just shot a 1/2 moa at 100 this morning.
So my question is does any one know if this bullet will have trouble stabilizing at 300 to 500 yrds?

Thanks in advance for any and all feed back or recomendations.
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  #2  
Old 12-12-2008, 04:37 PM
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Re: 7mm rem mag and 180gr vld?

I am a long way from an expert, but I would think that a stabilized bullet is a stabilized bullet.....it won't "un" stabelize down range. I know that the old "it shoots at 300, but not at 100 because it hasn't stabilized yet"" thing has been hashed out pretty good over on the 600/1000 benchrest fourm at BRCentral. What you are asking is opposite of this, but I would think that the Phisics is the same.

Just my uninformed, uneducated opinion, of course.
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  #3  
Old 12-13-2008, 02:28 AM
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Location: Peck Idaho
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Re: 7mm rem mag and 180gr vld?

Shoot some and see. My old hunting partner shoots a pile of the 175 grain Speer Grand slams in his 7mm Rem mag with no problems. I've found that the only way your really going to tell what works in your specific rifle is to shoot them and see.
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  #4  
Old 12-13-2008, 10:00 AM
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Re: 7mm rem mag and 180gr vld?

If your rifle just shot a group that small and the bullets didn't key hole, then I would say you are good to go.
Load some more up and extend the range if you have any doubts.

Last edited by Bravo 4; 12-13-2008 at 10:04 AM.
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  #5  
Old 12-14-2008, 05:25 AM
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Re: 7mm rem mag and 180gr vld?

You'll be fine. I've shooting a similar twist for three years now and shoot to 1200 yards with it.
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  #6  
Old 12-17-2008, 02:13 PM
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Re: 7mm rem mag and 180gr vld?

Thanks for the replies.I have shot out to 300 yrds. so far and no key holes so i'm happy
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  #7  
Old 12-20-2008, 09:57 PM
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Location: Tri-Cities, WA
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Re: 7mm rem mag and 180gr vld?

There is a guy named Brian Litz who is a competition shooter and a ballistitian who goes into great detail about the 180gr berger VLD bullet. Here is a link to one of his articles http://bryanlitz.bravehost.com/artic...mNumberOne.pdf.
According to him 'optimal' twist rate can vary depending on conditions, the worst or coldest (0 degrees-0% humidity) being 1-8.7" twist, and the best (100 degrees-100% humidity) being 1-10.5" twist. A buddy of mine shoots a 7wsm 9 twist 3 groove and it does exceptionally well at 1100yds i don't think a half twist would matter too much. Interestinglly enough Brian Litz uses a 1-8.7" twist barrel in his test.
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