Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Rifles, Reloading, Optics, Equipment > Rifles, Bullets, Barrels and Ballistics


Reply

Len Backus- Please tell us about the 7mm Dakota

 
LinkBack Thread Tools Display Modes
  #8  
Old 03-03-2005, 04:25 PM
Platinum Member
 
Join Date: Jun 2001
Location: Palmer, Alaska
Posts: 2,539
Re: Len Backus- Please tell us about the 7mm Dakota

Speedbump,

Sounds about right because I get about 3550 fps out of the 30/338 Lapua Imp with a 178 A-Max in the 30.5" tube.
__________________
Brent Moffitt
Reply With Quote
  #9  
Old 07-02-2012, 02:22 PM
Bronze Member
 
Join Date: Jan 2011
Posts: 34
Re: Len Backus- Please tell us about the 7mm Dakota

Quote:
Originally Posted by Len Backus View Post
CL

I've been a 7 Dakota user for about 3 years or so. I would consider it to be a ballistic twin of the 7 STW since the case capacity is within 1 grain. I got started on it when I bought an in-stock custom rifle. I was asking around for an available rifle in 7 STW and got steared toward a great rifle in 7 Dakota.

I buy the Dakota brass through Midway...around $26 for 20 pieces if I remember. I don't shoot brass all that long but I think you could get around 20 firings if you weren't pushing pressures too high. Initial case neck runout is around 6 or 7. I once challenged Don Allen about this and he took some of my high-runout returned brass and fired a .3 something group with it.

I bought 200 pieces from someone on LRH.com a couple months back and the runout was around 2. So maybe I just got 6 or 7 unlucky lots over the 3 years?? Anyway, the initial runout doesn't matter after the first firing. The cases also seem to be too short for saami specs. They always stretch in base to shoulder length about 15 or 20 thousandths at first...and this is with rifles chambered with reamers from 3 different sources.

With a 176 grain Cauterucio (.750 bc) and 76 grains of H1000 I get between 3100 and 3150 with a 26 inch barrel. It varies a little depending on the barrel. These are fairly hot loads. Minor casehead marks and an occasional sticky extraction.

I never considered the .308 version because I have always been a proponent of using the best bullet BC and the .284 is quite superior to the .308 given the same bullet weight. And of course, you can drive a given weight .284 bullet faster than with a .308 bullet.

Don't know about the case forming question.

Len,

I have just completed a 7MM Dakota Imp. build on a Stiller TAC300 Action and a Krieger Rem Varmit Taper 26" Barrel, McMillian Game Scout Stock. My case design increased case capacity 6.7 Grains and I am planning on trying Retumbo and H1000 powders. All I have done is broke my barrel in and fireformed my cases. Waiting on my dies before I start working up loads so I will not over work the necks.

My questions is how are the 177 Grain Caurterucios for Long Range hunting out to 1000 Yds.? Also any suggestions on seating depth? I also have 180's in the Berger VLD and JLK's. The Caurterucios have such a great BC that I thought I would start with them provided they kill effectively.

Thanks,
Reply With Quote
  #10  
Old 07-02-2012, 03:01 PM
PUBLISHER
 
Join Date: May 2001
Posts: 5,756
The Cauteruccio is a great bullet at the range you mention though I never shot an animal past 720 with them. I later learned that the bc can't possibly be as high as someone had told Bob C.

It must be about the same as the Berger 180, maybe a tad less.

We all now know so much more about accurate bc testing than we did back then.

I switched to the Bergers a few years ago.
__________________


Long Range Hunting Rifles

Long Range Rifles, LLC - Ready To Ship

Components and assembly by LRH Sponsors
Reply With Quote
  #11  
Old 07-04-2012, 12:39 PM
Bronze Member
 
Join Date: Jan 2011
Posts: 34
Re: Len Backus- Please tell us about the 7mm Dakota

Len,

Thanks for your info. Is the terminal performance of the 177 Cart. on deer size game equal to the 180 Bergers?

Also I just got some info you might be interested in on all these bullets from a very well known person in the long range game and here is what he stated.

Have measured the BC's for all the bullets you mentioned, they are as follows. Note these are G1 BC's, all averaged from 3000 to 1500 fps.

Berger 180 VLD: .659

Berger 180 Hybrid: .674

JLK 180 VLD: .645

Cauterucio 177 VLD: .683

Cauterucio 189 VLD: .703

Of course BC does not come into play unless they are effective for hunting and are accurate. Just trying to start with what gives good down range terminal killing performance and highest energy when I start working up loads. Want to make my barrel last as long as possible.
Reply With Quote
  #12  
Old 07-04-2012, 01:34 PM
PUBLISHER
 
Join Date: May 2001
Posts: 5,756
Yes, I think so.
__________________


Long Range Hunting Rifles

Long Range Rifles, LLC - Ready To Ship

Components and assembly by LRH Sponsors
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: Len Backus- Please tell us about the 7mm Dakota
Thread Thread Starter Forum Replies Last Post
Leopard In A Tree, by Len Backus Len Backus Hunting Success Stories - Discussion 9 08-19-2012 02:07 PM
A Thousand Stars In The Sky By Len Backus ADMIN Hunting Success Stories - Discussion 11 06-29-2010 01:31 AM
They Called Me El Diablo, by Len Backus Len Backus Hunting Success Stories - Discussion 1 07-14-2007 04:16 PM
Len Backus Scores on Mulie at 690 Yards Bud Meadows Long Range Hunting & Shooting 6 11-08-2001 11:22 PM

Current Poll
Do you watch outdoor shows live or by recording them?
Always recorded - 13.90%
102 Votes
Mostly recorded - 24.11%
177 Votes
Sometimes recorded - 13.49%
99 Votes
Rarely or never recorded - 48.50%
356 Votes
Total Votes: 734
You may not vote on this poll.

All times are GMT -5. The time now is 09:40 PM.


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