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

number of grooves

 
LinkBack Thread Tools Display Modes
  #1  
Old 01-17-2008, 08:04 PM
Junior Member
 
Join Date: Dec 2007
Posts: 19
number of grooves

Can someone tell me the advantage of 3 and 5 groove barrels. I am sure there are advantages to each just not sure what they are for each.

Thanks
Reply With Quote
  #2  
Old 01-17-2008, 08:41 PM
Gold Member
 
Join Date: Aug 2005
Posts: 558
Quote:
Originally Posted by coonhunter View Post
Can someone tell me the advantage of 3 and 5 groove barrels. I am sure there are advantages to each just not sure what they are for each.

Thanks
After having several I can say without hesitation that there is no advantage EVER to a 3 groove barrel, they might be OK with a solid but they are rough with a jacketed bullet. A 4,5 or 6 groove is a better choice 10 times out of 10.
The philosophy behind the 3 groove is that throat erosion is retarded because the lands (riflings) are wider than on a 4,5,or6 groove barrels. but firecracking of the throat begins before erosion, so with a 3 groove barrel your accuracy will go away faster because there are wider rougher surfaces in your bore than with a 4,5, or 6 groove.
UB
__________________
Attitude:
It takes 43 muscle's to frown and 17 to smile, but only 3 for proper trigger pull.
Reply With Quote
  #3  
Old 01-17-2008, 10:37 PM
Platinum Member
 
Join Date: Jul 2002
Posts: 2,856
Like Uncle Bud said the 3 groove barrels are supposed to last longer and some say clean easier , I've had two one Pac-Nor that shot well and one Lilja that shoots great and hardly fouls at all. I like the Lilja barrel i have now , I can't say that its to rough on my bullets but I'm not shooting a hot rod either.

I have had several of the 5R barrels , a few from Rock Creek and one From Obermeyer and that shot great very accurate barely fouled and they did shoot a tad faster than a conventionaly rifled barrel , I have a 6mm here right now from Bartlien thats gonna be a 6-6.5x47 very soon. I'm tending to lean toward cut rifeld barrels now days , not realy sure why , I guess cause I've been talking to them more.

I would reccomend one of the 5R barrels either from Rock Creek , Bartlien , Broughton or Obermeyer if you can get hold of Boots.

Any of the high end barrels are gonna be easy on the fouling as they are all supposed to be hand lapped.
__________________
Si Vis Pacem Parabellum
Molon Labe
Reply With Quote
  #4  
Old 01-18-2008, 12:29 PM
Gold Member
 
Join Date: Dec 2006
Location: FREE RUN, MS
Posts: 774
I have a Lilja 3 groove on my 270AM. All I ever get out of it is carbon never see any copper and I look pretty hard for it. And itll shoot .5 inch groups at 250! Yea, JJ I figured it out thanks man!

Reason for the reply is Lilja has a article on this subject on his web page you might find a good read.
__________________
MEMBER "AM STRIKEFORCE"
Reply With Quote
  #5  
Old 01-18-2008, 01:07 PM
Junior Member
 
Join Date: Dec 2007
Posts: 19
Thanks for the replys. I will read he article on Lilja's website. Again thanks for the replys and any other opinions are welcome.
Reply With Quote
  #6  
Old 01-19-2008, 07:20 PM
Platinum Member
 
Join Date: Feb 2004
Location: Pennsyltucky
Posts: 2,625
another advantage the 3 groove was supposed to have would be there was less cross section of the bullet that had to engrave into the rifling. yes the lands are wider but still, the total amount was not as much as conventional 6-8 grooves. this would allow for a little less start up pressure to engrave the bullet into the rifling. of course this equates to potentially faster speeds.

any of the "odd" number of grooves was supposed to put less or more even stresses on the bullet because the bullet wasn't being stressed directly across but rather a land would be across from a groove. i'm pretty sure this has never been proven to be an advantage, but it's an interesting theory.

i think 3 groove barrels have been out long enough for the theories to be proven one way or another and the disadvantages seem to far outweigh the advantages. as UB said and i think most would agree,there's just no reason to get a 3 groove barrel. on the other hand, a 5 groove, especially with canted lands. you're in hog heaven with that puppy!
__________________
davesonlinedeals.com
Reply With Quote
  #7  
Old 01-19-2008, 08:41 PM
Gold Member
 
Join Date: Jan 2006
Location: Nebraska
Posts: 507
Here is a link to a post on Benchrest Central by Frank Green of Bartlien Barrels on this matter.


Number of grooves????? - Benchrest Central Forums

James
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: number of grooves
Thread Thread Starter Forum Replies Last Post
grooves? Tikkamike Rifles, Bullets, Barrels & Ballistics 4 07-07-2011 08:52 PM
Grooves 3 or 6? liltank Long Range Hunting & Shooting 4 10-30-2009 04:12 PM
Number of grooves for best accuracy? NorthernSniper Rifles, Bullets, Barrels & Ballistics 6 06-25-2006 02:43 PM
4 Grooves or 6? Tim Behle Rifles, Bullets, Barrels & Ballistics 10 01-17-2006 09:16 AM
Number of grooves No Fear in Accuracy Rifles, Bullets, Barrels & Ballistics 0 01-07-2002 02:58 PM


All times are GMT -5. The time now is 01:48 PM.


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