Long Range Hunting Online Magazine


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

Rifles, Bullets, Barrels & Ballistics Applied Ballistics


Reply

Anyone try heavy 308s in a 5-R barrel?

 
LinkBack Thread Tools Display Modes
  #1  
Old 09-10-2013, 07:36 PM
Junior Member
 
Join Date: Mar 2011
Posts: 22
Anyone try heavy 308s in a 5-R barrel?

I have a pet load for 308 which uses a 210gr SMK (don't need to argue about the 210 being too heavy for 308, it works well and the proof is in the groups I am getting). I am getting 1/2 MOA or better out of an 18" barrel in an LR-308. I am looking to add a Remington 700 to the collection and trying to decide between a 1 in 10 twist run of the mill Remy barrel (in an SPS Tactical AAC) and the 5-R 1 in 11.25. My concern is that the 210gr bullet will not stabilize in 11.25. Anyone have any experience with heavy bullets in a Remy 5-R barrel?

Thanks!
Reply With Quote
  #2  
Old 09-10-2013, 09:30 PM
Silver Member
 
Join Date: Jan 2013
Location: Southeast Kansas
Posts: 229
Re: Anyone try heavy 308s in a 5-R barrel?

Go to.... JBM - Calculations - Stability

Just punch in your data and go. Make sure you click on the explanation of terms to know what their system of rating stability means. As a rule of thumb, match shooters choose the slowest twist that will stabilize their bullet, if that helps.
Reply With Quote
  #3  
Old 09-10-2013, 09:50 PM
Platinum Member
 
Join Date: Oct 2008
Location: Alabama
Posts: 6,296
Re: Anyone try heavy 308s in a 5-R barrel?

I have a 5R .308 Win and I have a pet load using 210 Berger VLD's. it shoots 1-hole cloverleafs.

Left: Nosler 168 Custom Comp seated to SAAMI spec 2.810"
Right: Berger 210 VLD load



It loves the 168 load seated to SAAMI spec...That allowed me to shoot a 1.286" 24-shot group.


__________________
"I'm just a peckerwood who lives in the hills with too many guns..." - Bob Lee Swagger

"Give me a minute...I'm good. Give me an hour...I'm great. Give me 6 months...And I'm unbeatable." - Col. Hannibal Smith

Ignore everything I say, because I have a reading comprehension and memory problem...

Quote:
Originally Posted by WildRose View Post
The 284 is to the STW what a tricycle is to a Ninja.
Reply With Quote
  #4  
Old 09-10-2013, 09:56 PM
Junior Member
 
Join Date: Mar 2011
Posts: 22
Re: Anyone try heavy 308s in a 5-R barrel?

Thanks!!!! Nice little tool. I get a value of 1.290. My understanding is that the 5-R barrel is a hammer forged 5-grove polygonal rifled barrel, I wonder if this changes the calculation?
Reply With Quote
  #5  
Old 09-10-2013, 10:00 PM
Junior Member
 
Join Date: Mar 2011
Posts: 22
Re: Anyone try heavy 308s in a 5-R barrel?

MudRunner, that is exactly what I was looking for! What is the BC on the Berger 210? The SMK is .645 at 1800 FPS and above and it is 1.483 long. I suspect that the Berger is similar. Thanks!

P.s. I am limited in the DPMS on oal by the magazine but with the long Remy chambers my rounds should look much more like yours.
Reply With Quote
  #6  
Old 09-10-2013, 10:05 PM
Silver Member
 
Join Date: Jan 2013
Location: Southeast Kansas
Posts: 229
Re: Anyone try heavy 308s in a 5-R barrel?

Quote:
Originally Posted by mleeber View Post
Thanks!!!! Nice little tool. I get a value of 1.290. My understanding is that the 5-R barrel is a hammer forged 5-grove polygonal rifled barrel, I wonder if this changes the calculation?
It shouldn't change it, at least on a registerable level. The only significant shifts you might see would be because of barometric pressure.
Reply With Quote
  #7  
Old 09-10-2013, 10:12 PM
Junior Member
 
Join Date: Mar 2011
Posts: 22
Re: Anyone try heavy 308s in a 5-R barrel?

I ran the same data for a 10 twist and got 1.63. Very surprised that 1.25 makes that big a difference.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes



All times are GMT -5. The time now is 01:04 PM.


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