Long Range Hunting Online Magazine


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


Reply

168 Barnes lrx in a 9.5 twist?

 
LinkBack Thread Tools Display Modes
  #1  
Old 06-14-2012, 11:41 PM
Silver Member
 
Join Date: Aug 2009
Location: British Columbia Canada
Posts: 163
168 Barnes lrx in a 9.5 twist?

I'd like to know if anyone has shot the Barnes 7mm lrx 168 grain bullet in a 9.5 twist barrel. Barnes calls for a 9 twist. I'm gonna find out on my own anyways it's just gonna be a while before the rifle shows up. Its been a while since I have shot a factory rifle but I convinced myself that I should give the new kimber 84L montanna a try. It's around 5lb 10 oz in a 280 AI. It's pretty hard to get a custom down to that weight never mind at about 1400$.
Reply With Quote
  #2  
Old 06-15-2012, 10:18 AM
Silver Member
 
Join Date: Sep 2011
Location: West Wendover, NV
Posts: 197
Re: 168 Barnes lrx in a 9.5 twist?

Almost. I have a Remington Sendero in 7stw, believe its a 9.25 twist. Barnes told me the same thing, 1 in 9 twist above 5000ft, and a 9.25 won't stabilize it. Weather hasn't been good here to sight in the new scope/do load development (10-20 mph winds on my days off!!!) I have 20 rounds with this loaded up waiting for the weather to clear.
Reply With Quote
  #3  
Old 06-15-2012, 08:54 PM
Platinum Member
 
Join Date: Jan 2008
Location: Falls Church, VA
Posts: 3,257
Re: 168 Barnes lrx in a 9.5 twist?

Quote:
Originally Posted by .284 View Post
I'd like to know if anyone has shot the Barnes 7mm lrx 168 grain bullet in a 9.5 twist barrel. Barnes calls for a 9 twist. I'm gonna find out on my own anyways it's just gonna be a while before the rifle shows up. Its been a while since I have shot a factory rifle but I convinced myself that I should give the new kimber 84L montanna a try. It's around 5lb 10 oz in a 280 AI. It's pretty hard to get a custom down to that weight never mind at about 1400$.

9.5 twist in a 7mm? what do they expect you to shoot in that rifle...150grain bullets? You might have some trouble stabilizing the 168 Barnes as they are even longer than 'regular' bullets.

Consider the 168VLD as a good alternative.
__________________
I'm not gonna shoot here. I'm gonna shoot waaaaaaaay over there!
Reply With Quote
  #4  
Old 06-15-2012, 09:43 PM
Silver Member
 
Join Date: Aug 2009
Location: British Columbia Canada
Posts: 163
Re: 168 Barnes lrx in a 9.5 twist?

It was the stabilization I was wondering about. This is going to be a sheep rifle so Bergers are out of the question because I don't want a big hole in my cape and I also don't trust them when hiking through bear country.
Reply With Quote
  #5  
Old 06-17-2012, 10:16 AM
Junior Member
 
Join Date: Feb 2009
Location: Colorado
Posts: 22
Re: 168 Barnes lrx in a 9.5 twist?

I'm off to the range this morning to test the 168 grn. LRX's in my 7 rem. mag with it's std 1:9.5 twist.I got google eyed when I saw these bullets and ordered b4 I did any REAL research.
I think Barnes my have jumped the gun a little by releasing this w/o any accurate load data. They told me to use their 175 grn TSX load data. But things don't really add up.

This bullet is long! Much longer than the 175 TSX and I'm alittle concerned about the 3.24 seating callout seems a little deep in the case for this long sucker. Also shows a 1:9.5 twist for the 175.

I used the Sierra/Berger load data for their 168 respective bullets as a starting point and played with seating and charge from there.

I'll let you know what I find later today! and would welcome anyone elses comment as well!!

Bill
Reply With Quote
  #6  
Old 06-17-2012, 05:12 PM
Silver Member
 
Join Date: Aug 2009
Location: British Columbia Canada
Posts: 163
Re: 168 Barnes lrx in a 9.5 twist?

Thanks Bill, hopefully they work out for you. I'm interested to see how things turn out.
Reply With Quote
  #7  
Old 06-17-2012, 06:43 PM
Junior Member
 
Join Date: Feb 2009
Location: Colorado
Posts: 22
Re: 168 Barnes lrx in a 9.5 twist?

AH...back from the range and having a beer!.Started to get hot and is now 96*. I had some very interesting results with the following loads that can be verified by my shooting partner and various bystanders.

I started the day with a 62grn load of IMR 4831 and coal of 3.25 as Barnes Bullets seem to like a little "jump". This load produced a 1st shot of 2995 2nd @2955 3rd@2975 ......Impressive velocity considering Sierra lists a max of 62.2@ 2900fps for the 168grn Matchking. The group was not acceptable but the muzzle velocity was.....And we're not done!

The loads were then bumped to 62.5 grns (IMR 4831) coal of 3.25. Velocities went to 3031,3029 and 3015. the groups were better but right @ 1".......Still chasing!

Next was the same powder charge (62.5) but seating depth was moved to 3.26. Velocities were very much the same but the groups did come in a bit.

I then moved to what I'd consider a HOT load based on various load manuals. I went to 63 grns. of IMR 4831 with the OAL set to 3.28. This produced verified velocities @ 3298.....3318......3336 and the groups were acceptable???@ just under an inch with a 168 grn bullet.

Yeh I know!!!!!!!....But I think that with the length and design of this bullet (3 bands etc.) combined with seating it out a bit farther produced these velocities. An anomaly??? I can't say for sure. But there were absolutely NO pressure signs that we could see. I will have our very reputable gunsmith give a non-informed visual just to be certain! Ialso could not visibly see any indication of "tumbling" clean holes straight away! I could only test @ 100mtrs. as the 200mtr. was under repair so I'm not sure if the bullet had enough distance vs velocity to truly characterize stabalization.

To verify that the crono was working properly I fired some factory Barnes Vortex 150grn. ammo that came out to be right @ 2800 fps..and is listed to be@3060 also Winchester Supreme 150 grn. btips just above 2900 ..apples to apples.I also had rounds of 168 grn Gamekings loaded to 62.5 4831 and set to Sierras book oal that produced 2950ish but was a little sticky on the bolt throw.My partner also commented on the extra blowback.

This test was performed using a Weatherby Vangard semi custom with a B&C Medalist stock (bedded),Timny trigger set@ 2.5lbs and a Crony.....Crony!

AND of course I don't condone the use of this load data for any other use than in MY rifle!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Friggan Liberals!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

IF you have ANY positive or negative comments PLEASE reply! this is a work in progress....The more input the better!

More beer! and Happy Father's Day!
Bill
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: 168 Barnes lrx in a 9.5 twist?
Thread Thread Starter Forum Replies Last Post
Barnes 285 gr 338 VThomps Rifles, Bullets, Barrels and Ballistics 4 01-20-2010 08:56 PM
Fast Twist VS Slow Twist jwp475 Rifles, Bullets, Barrels and Ballistics 6 05-02-2008 01:00 AM
Twist and lands design vs. barnes .270 130gr. tripple shock 308 nate Rifles, Bullets, Barrels and Ballistics 7 02-01-2007 06:27 PM
Why not Barnes? DONTSTROKEME Reloading 17 12-27-2006 05:10 PM
22-250AI 1 in 8 twist or 1 in 9 twist Iron Worker Rifles, Bullets, Barrels and Ballistics 3 12-09-2006 10:54 PM

Current Poll
Do you archery hunt for elk?
YES - 34.34%
114 Votes
NO - 48.49%
161 Votes
Not yet, but I plan to. - 17.17%
57 Votes
Total Votes: 332
You may not vote on this poll.

All times are GMT -5. The time now is 07:19 PM.


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