140gn 7mm wind drift

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Tim N
Posts: 1337
Joined: Fri Jan 25, 2013 8:18 pm
Location: Branxton NSW

140gn 7mm wind drift

#1 Postby Tim N » Fri Oct 28, 2016 1:29 pm

Hi All,
One for those more tech savvy than me :!:
How dose the 140gn berger hunting projectile go at 600/1000 doing 3250f/s compared to:
168 @ 3100 and 180 @ 2950
The 140gn velocity is a guess
If anyone has spare time to figure this out it would be great
We don't rise to the level of our expectations, we fall to the level of our training. Archilochos 680-645 BC

Norm
Posts: 837
Joined: Fri Jul 23, 2010 10:21 pm
Location: Gippsland, Victoria

Re: 140gn 7mm wind drift

#2 Postby Norm » Fri Oct 28, 2016 2:04 pm

Tim N wrote:Hi All,
One for those more tech savvy than me :!:
How dose the 140gn berger hunting projectile go at 600/1000 doing 3250f/s compared to:
168 @ 3100 and 180 @ 2950
The 140gn velocity is a guess
If anyone has spare time to figure this out it would be great


140.... 3.5moa @ 600, 6.7 @ 1000
168 ....3moa @ 600, 5.5 @ 1000
180 ... 2.9moa @ 600, 5.5 @ 1000

These are drift numbers for a 10mph cross wind.
Last edited by Norm on Fri Oct 28, 2016 8:39 pm, edited 1 time in total.

6602steven
Posts: 103
Joined: Fri Feb 01, 2013 10:00 am
Location: Sydney

Re: 140gn 7mm wind drift

#3 Postby 6602steven » Fri Oct 28, 2016 3:13 pm

Norm wrote:
Tim N wrote:Hi All,
One for those more tech savvy than me :!:
How dose the 140gn berger hunting projectile go at 600/1000 doing 3250f/s compared to:
168 @ 3100 and 180 @ 2950
The 140gn velocity is a guess
If anyone has spare time to figure this out it would be great


140.... 3.5moa @ 600, 6.7 @ 1000
168 ....3moa @ 600, 5.5 @ 1000
180 ... 2.9moa @ 600, 5.5 @ 1000



Very interesting. I'm shooting 140gr VLD's at an average of 2928fps with an ES of 15 and an SD of 6 in my 7X47 from a 24" tubed hunting rifle.

I'm having Russel chamber a target gun with a 28" barrel to shoot 168's, I'm hoping to get 2850fps or so from the long tube with 168's but that may be optimistic given the small case capacity

Steve

Tim N
Posts: 1337
Joined: Fri Jan 25, 2013 8:18 pm
Location: Branxton NSW

Re: 140gn 7mm wind drift

#4 Postby Tim N » Fri Oct 28, 2016 10:02 pm

Thanks Norm
Not a huge difference at 600
Might be a good lower recoiling option
Has anyone tried them in a bigger 7?
Do they work in a 9 twist?
We don't rise to the level of our expectations, we fall to the level of our training. Archilochos 680-645 BC

Tim N
Posts: 1337
Joined: Fri Jan 25, 2013 8:18 pm
Location: Branxton NSW

Re: 140gn 7mm wind drift

#5 Postby Tim N » Sat Oct 29, 2016 6:33 am

Hey Steve
How does the 7x47 go?
We don't rise to the level of our expectations, we fall to the level of our training. Archilochos 680-645 BC

6602steven
Posts: 103
Joined: Fri Feb 01, 2013 10:00 am
Location: Sydney

Re: 140gn 7mm wind drift

#6 Postby 6602steven » Sun Oct 30, 2016 12:59 pm

Tim N wrote:Hey Steve
How does the 7x47 go?


As a hunting gun it's fantastic, hits hard and accurate but I'm waiting for a barrel to be chambered for a target gun. It won't out wind drift a SAUM shooting 180's but will be a fair bit ahead of my 6BR for wind drift

Steve

macguru
Posts: 1627
Joined: Wed Aug 05, 2009 9:49 am

Re: 140gn 7mm wind drift

#7 Postby macguru » Sun Oct 30, 2016 2:33 pm

here is the answer :)
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Tim N
Posts: 1337
Joined: Fri Jan 25, 2013 8:18 pm
Location: Branxton NSW

Re: 140gn 7mm wind drift

#8 Postby Tim N » Sun Oct 30, 2016 3:29 pm

So why are you selling them? :-k :-k
We don't rise to the level of our expectations, we fall to the level of our training. Archilochos 680-645 BC

macguru
Posts: 1627
Joined: Wed Aug 05, 2009 9:49 am

Re: 140gn 7mm wind drift

#9 Postby macguru » Sun Oct 30, 2016 8:27 pm

I like to give others a share of the good stuff :)

Actually, its taken me weeks to get even 2 projectiles shooting in my SAUM (the savage) , first I stumbled onto a ripper load for the 180 hybrid when I was down to my last 12 bullets (55.6g 09) (I have some coming now at last) , and then by dropping the load 1/2 grain (55g 09) I finally got the VLDs to shoot as well, although they drop a bit more. I am getting a bit sick of load testing that barrel so I think I will stop. Its an 8,5 twist HV Krieger.

The Barnard setup is 8 twist but I have some 183 sierras to try in that. I remember trying the 195gr but I did not find a load.
id quod est


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