Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Hunting > Long Range Hunting & Shooting

Long Range Hunting & Shooting Nightforce Optics


Reply

how fast is to fast-Berger VLDs

 
LinkBack Thread Tools Display Modes
  #1  
Old 03-31-2012, 01:25 AM
Silver Member
 
Join Date: Mar 2012
Location: Elk Garden,WVa
Posts: 205
how fast is to fast-Berger VLDs

I'm shooting 180 grain vlds in my 7mm rum at 3300 fps. I can't get it to shoot any better than 2" at 200 yds. I have varied my loads by as much as 4 grains, and have come as far as .060 off the lands.I was told that for the barrel twist that I have, I need to be shooting the 168 vlds.
I've heard that the vlds started coming apart anywhere from 3150-3400 fps. Just wondering if anyone could shed any light on this for me.
And while we are on the subject of berger vlds. At what velocity does the bergers start to stay together when impacting an animal. I'm worried about shooting an animal at any close distances. I'm hunting an area where my "normal" close shot is going to be around 600yds. But who knows whats going to happen while hunting.
Reply With Quote
  #2  
Old 03-31-2012, 09:09 AM
Platinum Member
 
Join Date: Feb 2007
Location: Townsend, Montana.
Posts: 7,851
Re: how fast is to fast-Berger VLDs

If you push the 180's or 168 over 3250 in a barrel twist faster that 1 in 9 you will probably start to see the problems. We run them at 3150 to 3200 in 9 twists all the time with no issues. We have taken game as close as 100 yards and less with 9 twists at 3200 and all was good. But expect a very very dead animal with a big hole at these distances. This does not bother me as I never save ribs anyway.

Jeff
__________________
Reply With Quote
  #3  
Old 03-31-2012, 02:15 PM
Silver Member
 
Join Date: Jan 2010
Location: utah
Posts: 366
Re: how fast is to fast-Berger VLDs

its not really coming apart but what happens with vld designs over 3000 fps is that a secondary shock wave starts appearing at the shoulder at around 3000 to 3200 fps. the longer the nose the the sharper the shoulder the worse the shock wave. This shock wave can do several things. 1 change bc unexpectantly with varying effect for atmospherics, 2 change the trajectory of bullet flight and 3 cause the bullet to loose stability.
Reply With Quote
  #4  
Old 03-31-2012, 02:23 PM
Platinum Member
 
Join Date: Nov 2008
Location: SW Montana
Posts: 4,473
Re: how fast is to fast-Berger VLDs

Quote:
Originally Posted by load View Post
its not really coming apart but what happens with vld designs over 3000 fps is that a secondary shock wave starts appearing at the shoulder at around 3000 to 3200 fps. the longer the nose the the sharper the shoulder the worse the shock wave. This shock wave can do several things. 1 change bc unexpectantly with varying effect for atmospherics, 2 change the trajectory of bullet flight and 3 cause the bullet to loose stability.
Why does slowing the twist or just adding a few thou to the jacket ,with no exterior design change, help if this is what was happening?
__________________
High Fence, Low Fence, Stuck in the Fence, if I can Tag it and Eat it, it's Hunting!

"Pain is weakness leaving your body"

Last edited by bigngreen; 03-31-2012 at 04:14 PM.
Reply With Quote
  #5  
Old 03-31-2012, 04:20 PM
Silver Member
 
Join Date: Mar 2012
Location: Elk Garden,WVa
Posts: 205
Re: how fast is to fast-Berger VLDs

thanks for the info
Reply With Quote
  #6  
Old 04-03-2012, 02:57 PM
Gold Member
 
Join Date: Sep 2010
Location: Coldwater michigan
Posts: 507
Re: how fast is to fast-Berger VLDs

Quote:
Originally Posted by oldmossy View Post
I'm shooting 180 grain vlds in my 7mm rum at 3300 fps. I can't get it to shoot any better than 2" at 200 yds. I have varied my loads by as much as 4 grains, and have come as far as .060 off the lands.I was told that for the barrel twist that I have, I need to be shooting the 168 vlds.
I've heard that the vlds started coming apart anywhere from 3150-3400 fps. Just wondering if anyone could shed any light on this for me.
And while we are on the subject of berger vlds. At what velocity does the bergers start to stay together when impacting an animal. I'm worried about shooting an animal at any close distances. I'm hunting an area where my "normal" close shot is going to be around 600yds. But who knows whats going to happen while hunting.
You never did mention what twist your barrel has?
Reply With Quote
  #7  
Old 04-03-2012, 03:01 PM
Gold Member
 
Join Date: Sep 2010
Location: Coldwater michigan
Posts: 507
Re: how fast is to fast-Berger VLDs

Quote:
Originally Posted by oldmossy View Post
I'm shooting 180 grain vlds in my 7mm rum at 3300 fps. I can't get it to shoot any better than 2" at 200 yds. I have varied my loads by as much as 4 grains, and have come as far as .060 off the lands.I was told that for the barrel twist that I have, I need to be shooting the 168 vlds.
I've heard that the vlds started coming apart anywhere from 3150-3400 fps. Just wondering if anyone could shed any light on this for me.
And while we are on the subject of berger vlds. At what velocity does the bergers start to stay together when impacting an animal. I'm worried about shooting an animal at any close distances. I'm hunting an area where my "normal" close shot is going to be around 600yds. But who knows whats going to happen while hunting.
The Berger site lists the 180gr to have a 9 twist.
And the 168gr to have a 10 twist
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: how fast is to fast-Berger VLDs
Thread Thread Starter Forum Replies Last Post
300 WSM......How Fast?? SBruce Rifles, Bullets, Barrels and Ballistics 20 10-07-2011 06:25 PM
How fast can you push Berger bullet in 264 WinMag guns_and_labs Reloading 4 05-12-2010 11:14 PM
338 RUM- HOW FAST WILL 300 GRN SMK GO ?? Down Under Hunter Long Range Hunting & Shooting 8 06-07-2007 10:04 AM
22-250 AI Fast Twist (1:8) using 75 gr either Berger VLD or A-Max Ben Steinsholt Reloading 6 09-11-2006 05:06 PM
Fast 223 coyote_runner Rifles, Bullets, Barrels and Ballistics 3 03-29-2004 03:57 PM

Current Poll
Do you archery hunt for elk?
YES - 34.32%
116 Votes
NO - 48.52%
164 Votes
Not yet, but I plan to. - 17.16%
58 Votes
Total Votes: 338
You may not vote on this poll.

All times are GMT -5. The time now is 01:33 AM.


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