Long Range Hunting Online Magazine


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

Long Range Hunting & Shooting Nightforce Optics


Reply

Who's stretching it out with a 270 WSM?

 
LinkBack Thread Tools Display Modes
  #50  
Old 04-25-2012, 11:56 PM
Silver Member
 
Join Date: Jun 2011
Posts: 229
Re: Who's stretching it out with a 270 WSM?

Anyone care to comment on the temp stability of '22 vs. Magpro? Trying to decide which route to go...
Reply With Quote
  #51  
Old 04-26-2012, 03:25 AM
Silver Member
 
Join Date: Jan 2009
Location: Northern Virginia
Posts: 179
Re: Who's stretching it out with a 270 WSM?

Couldn't really say. I do my load work in the Spring/Summer and shoot all year long. Haven't really noticed too much difference with RL22 or Magpro, in my case. I do notice that RL22 will climb in speed if shot quickly, due to chamber temps, but if allowed to cool, RL22 has been excellent as has Magpro.
__________________
SEMPER FI
Reply With Quote
  #52  
Old 04-26-2012, 05:56 AM
Gold Member
 
Join Date: Mar 2012
Location: Wolfesville, MD
Posts: 830
Re: Who's stretching it out with a 270 WSM?

Same here RE 22 and 150 bullets excellent velocity and accuracy and Reumbo for the 165 gr bullets
Reply With Quote
  #53  
Old 04-26-2012, 09:51 AM
Silver Member
 
Join Date: Jan 2009
Location: Northern Virginia
Posts: 179
Re: Who's stretching it out with a 270 WSM?

Quote:
Originally Posted by Truc View Post
Same here RE 22 and 150 bullets excellent velocity and accuracy and Reumbo for the 165 gr bullets
I have heard great things about Retumbo/RL25 and the 140 AB's as well. Just haven't messed with it as RL22 works pretty well for me.
__________________
SEMPER FI
Reply With Quote
  #54  
Old 05-06-2012, 06:46 AM
Bronze Member
 
Join Date: May 2012
Posts: 49
Re: Who's stretching it out with a 270 WSM?

Can anybody tell me how fast I would have to get the .277 170 grain Bergers to stabilize in a 1 in 10 barrel? I am currently getting 3,420 fps with 140 grain Accubonds out of my 270 Dakota with 27 1/2 inch 1 in 10 barrel, so I could probably push the 170s at about 3,100. Also, I am thinking of a very heavy 28 inch barrel with 1 in 10 twist on a 270 WSM built on a long action or single shot bolt action to seat the projectiles way out, for varminting past 500 yards. I am aware that 1 in 10 twist is a bit slow.
Reply With Quote
  #55  
Old 05-06-2012, 10:56 AM
Silver Member
 
Join Date: Nov 2007
Location: Near Mt Rainier
Posts: 230
Re: Who's stretching it out with a 270 WSM?

First we need to know the length of the Berger 170 gr bullets to use a formula to figure out the stability of the bullet. The Greenhill formula is the best known but RSI says they have a nore accurate one.

Second, what kind of powder are you using and what charge. It sounds like you have a real impressive load. Remember that 140 Accubonds have a higher BC than the Bergers.

For 170gr bullets I would expect that VV N-570 would be your highest velocity powder.
Reply With Quote
  #56  
Old 05-06-2012, 07:24 PM
Platinum Member
 
Join Date: Nov 2008
Location: SW Montana
Posts: 4,547
Re: Who's stretching it out with a 270 WSM?

Quote:
Originally Posted by longarm View Post
Can anybody tell me how fast I would have to get the .277 170 grain Bergers to stabilize in a 1 in 10 barrel? I am currently getting 3,420 fps with 140 grain Accubonds out of my 270 Dakota with 27 1/2 inch 1 in 10 barrel, so I could probably push the 170s at about 3,100. Also, I am thinking of a very heavy 28 inch barrel with 1 in 10 twist on a 270 WSM built on a long action or single shot bolt action to seat the projectiles way out, for varminting past 500 yards. I am aware that 1 in 10 twist is a bit slow.
Punch your numbers into JBM stability calculator. JBM - Calculations - Stability

Your going to need to be 6000ft plus, I'm going to give them a try out of my WSM since the Matrix stabilize fine for me but bullet design makes a difference as well.
__________________
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"
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: Who's stretching it out with a 270 WSM?
Thread Thread Starter Forum Replies Last Post
25-06 Case stretching - what have you experienced? wallypedal Reloading 12 05-07-2012 08:15 AM
Stretching the 308 orkan Long Range Hunting & Shooting 25 07-14-2010 09:23 PM


All times are GMT -5. The time now is 08:49 PM.


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