Long Range Hunting Online Magazine


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

Long Range Hunting & Shooting Nightforce Optics


Reply

3 grove barrel??

 
LinkBack Thread Tools Display Modes
  #1  
Old 12-11-2009, 10:24 AM
Junior Member
 
Join Date: Nov 2009
Posts: 7
3 grove barrel??

I have a 28” 1:10 #5 Lilja barrel going on a .300. I have agonized over all sorts of options an variables on this riffle and thought I had every thing set. Then the gun smith called and dropped this bomb on me. “Three or six grove barrel?” All of my guns are 6. What may I gain or not gain using a 3?

I understand that it may be easier to clean…..I don’t care about that. I am wondering about performance. I typically shoot 210 berger bullets and have had some luck with 200 gr SGK. But this gun has not been fired yet, since it is still in a bunch of pieces..... It is a hunting rifle and I am comfortable shooting to 800 yards.


Thanks
Reply With Quote
  #2  
Old 12-11-2009, 11:15 AM
Platinum Member
 
Join Date: Jan 2003
Location: The rifle range, or archery range or behind the computer in Alaska
Posts: 3,582
Re: 3 grove barrel??

3 grooves shoot as good as 6 grooves. The theory behing the thre groove is that the lands are twice as wide as the lands in a 6 groove and thoretically increases throat life. It wont offer twice the life butu can offer some percentage more usable life. Most guys shy away from them with smaller calibers due to the jacket displacement of smaller bullets.
Reply With Quote
  #3  
Old 12-11-2009, 09:27 PM
Platinum Member
 
Join Date: Dec 2008
Location: Grantsville Utah
Posts: 3,471
Re: 3 grove barrel??

I had a 3 groove 11 twist Lilja in 300 RUM and it shot great. The most impressive thing was the barrel life which was better than I expected....Rich
Reply With Quote
  #4  
Old 12-11-2009, 09:46 PM
Platinum Member
 
Join Date: Feb 2009
Posts: 3,542
Re: 3 grove barrel??

You said all your guns are 6 grooves, are you happy with how they perform? if so then you could go 6. What's your smith think? 6 or 3-you'll hear pro and cons but I haven't seen any concrete evidence that 6 is better than 3 or vise versa. I go with 3 grooves.
Reply With Quote
  #5  
Old 12-11-2009, 09:55 PM
Platinum Member
 
Join Date: Jul 2004
Location: Texas
Posts: 5,590
Re: 3 grove barrel??

Quote:
Originally Posted by elkaholic View Post
I had a 3 groove 11 twist Lilja in 300 RUM and it shot great. The most impressive thing was the barrel life which was better than I expected....Rich
+1

I have used 6 of the 3 grove barrels on small bores (17 CAL AND 224 CAL) And have been
very pleased with them.

I have not used them on larger cal but either 6 or 3 groves should work very well.

J E CUSTOM
__________________
"PRESS ON"
Reply With Quote
  #6  
Old 12-11-2009, 10:24 PM
Gold Member
 
Join Date: Sep 2005
Location: Central AZ
Posts: 937
Re: 3 grove barrel??

Many of us shooting the 270AM and 277AM rifles ran into problems using the longer/heavier .277 wildcat bullets in Lilja 3-groove barrels. After about 350-400 rounds down the tube, these bullets began to break apart before reaching the target. The problem was primarily with the bullets. The 3-groove barrels have a lot of contact with the bullet jacket. The heavier/longer bullets have a lot more bearing surface. When you combine that with a slightly thinner jacket, you get a recipe for disaster. We needed a heavier jacketed bullet (not available yet), or a shorter bullet (lighter) to reduce the bearing surface to solve our problem. The other solution might have been to switch to more grooves in the barrel. A quick search will turn about several threads on this problem that began occuring approx. two years ago.

I should emphasize that this situation with the .270 Allen Magnums was the exception rather than the rule with 3-groove barrels. Other calibers fair very well. It shouldn't be a problem in a 30 cal, unless you start shooting 240 gr. bullets with thin jackets. :-)
Reply With Quote
  #7  
Old 12-13-2009, 04:52 PM
Platinum Member
 
Join Date: Jul 2004
Location: Texas
Posts: 5,590
Re: 3 grove barrel??

Quote:
Originally Posted by azsugarbear View Post
Many of us shooting the 270AM and 277AM rifles ran into problems using the longer/heavier .277 wildcat bullets in Lilja 3-groove barrels. After about 350-400 rounds down the tube, these bullets began to break apart before reaching the target. The problem was primarily with the bullets. The 3-groove barrels have a lot of contact with the bullet jacket. The heavier/longer bullets have a lot more bearing surface. When you combine that with a slightly thinner jacket, you get a recipe for disaster. We needed a heavier jacketed bullet (not available yet), or a shorter bullet (lighter) to reduce the bearing surface to solve our problem. The other solution might have been to switch to more grooves in the barrel. A quick search will turn about several threads on this problem that began occuring approx. two years ago.

I should emphasize that this situation with the .270 Allen Magnums was the exception rather than the rule with 3-groove barrels. Other calibers fair very well. It shouldn't be a problem in a 30 cal, unless you start shooting 240 gr. bullets with thin jackets. :-)
Also wasn't there a problem with twist rates being to fast ?

Some were trying to use fast twist like (1 in 7 or 8) and these are very hard on bullets even in
6 groove barrels at the velocities some of the wildcats achieve.

The best advice I can give is to talk to Dan Lilja and tell him what you are going to expect out
of your rifle (Velocity) and let him recomend the proper twist and groove style that is best.

J E CUSTOM
__________________
"PRESS ON"
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: 3 grove barrel??
Thread Thread Starter Forum Replies Last Post
Long Range Prairie Dog Hunt In South Dakota By Jesse Grove ADMIN Technical Articles - Discussion 11 05-10-2009 08:32 PM
Bench Mark 3 grove button rifled Iron Worker Rifles, Bullets, Barrels & Ballistics 11 03-14-2009 02:43 PM
WTS: Heavy Contoured Barrel blank - Single Cut , 5R grove , 27.5 " GIJOE Guns For Sale 7 12-08-2005 12:46 AM
BARREL TWIST&GROVE Rifles, Bullets, Barrels & Ballistics 4 07-30-2003 11:23 PM
4-SALE 3 Lilja SS 6mm 3 grove 1-8 twist HV 29" finish mbianchini Guns For Sale 3 05-12-2003 08:48 PM


All times are GMT -5. The time now is 09:54 AM.


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