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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Drop in Velocity?
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<blockquote data-quote="Fiftydriver" data-source="post: 60469" data-attributes="member: 10"><p>bcraft1111,</p><p></p><p>Your big Warbird will certainly benefit from both added length an diameter on the barrel. This will give you mroe velocity and a stiffer barrel.</p><p></p><p>I #4 contour is pretty light at 27" for the Warbird. I would personally use nothing lighter then a #5 at this length and would prefer a #6 contour. </p><p></p><p>I use 30" #6 contours on my Extreme Sporters in the Allen Magnums and accurcy is excellent with the Lilja barrels.</p><p></p><p>The #7 will only add more barrel stiffness which is a very good thing for accuracy.</p><p></p><p>I am not sure what Gary's contours measure compared to Lilja barrels but they will be similiar I am sure. Comparing a Lilja #4 and #7 contours both with 30" finish lengths, here are the barrel weights.</p><p></p><p>#4 contour: 3.8 lbs at 30"</p><p>#7 contour: 5.5 lbs at 30"</p><p></p><p>Thats +30% more barrel mass for the #7 contour. This is significant and will show up on target.</p><p></p><p>This is a heavy barrel though for a sporter rifle with a composite stock. May feel a little muzzle heavy. I would certainly recommend fluting a #7 contour barrel and I would have it fluted with a large diameter flute in the .312" wide range. </p><p></p><p>This is how I have Lilja flute my barrels and over a 30" barrel length you will loose 3/4 lb of barrel weight while not loosing any stiffness or accuracy potential. Plus you have the flutes to aid more rapid barrel cool down.</p><p></p><p>I will be honest and say I have not played with the octogon and polygonal barrels much and certainly not enough to tell you I recommend them. Gary is the one to ask that question to find out the benefits of this system.</p><p></p><p>I use Liljas 3 groove system and have never had a reason to change, amazing accuracy, great throat life and higher velocities then conventional rifling with less bore fouling as well. Well, bore fouling is simply not an issue with any Lilja barrel if they are broken in properly.</p><p></p><p>So yes I would certianly go with a longer heavier barrel. I just got in my personal Lilja 30" 257 barrel for my 257 Allen Magnum rifle. This rifle will be a project in seeing how light I can build one of my extreme sporters in the round without loosing any balancing qualities or performance in velocity or accuracy.</p><p></p><p>The barrel is still a #6 contour but I had it fluted with the heavy .312" wide flutes which bring the barrel weight down to an even 4.0 lbs! Quite light for a 30" #6 barrel.</p><p></p><p>I will be using a McMillan BDL stock with their lightest fill and expect to get the rifle weight in the 8 1/4 lb range relatively easily. I will be using a full accurized Rem 700.</p><p></p><p>This rifle will easily play with the 1/4 moa range at 100 yards and sub 1.5" groups at 500 yards with a point blank range nearly out to this range!</p><p></p><p>Good Shooting!!</p><p></p><p>Kirby Allen(50)</p></blockquote><p></p>
[QUOTE="Fiftydriver, post: 60469, member: 10"] bcraft1111, Your big Warbird will certainly benefit from both added length an diameter on the barrel. This will give you mroe velocity and a stiffer barrel. I #4 contour is pretty light at 27" for the Warbird. I would personally use nothing lighter then a #5 at this length and would prefer a #6 contour. I use 30" #6 contours on my Extreme Sporters in the Allen Magnums and accurcy is excellent with the Lilja barrels. The #7 will only add more barrel stiffness which is a very good thing for accuracy. I am not sure what Gary's contours measure compared to Lilja barrels but they will be similiar I am sure. Comparing a Lilja #4 and #7 contours both with 30" finish lengths, here are the barrel weights. #4 contour: 3.8 lbs at 30" #7 contour: 5.5 lbs at 30" Thats +30% more barrel mass for the #7 contour. This is significant and will show up on target. This is a heavy barrel though for a sporter rifle with a composite stock. May feel a little muzzle heavy. I would certainly recommend fluting a #7 contour barrel and I would have it fluted with a large diameter flute in the .312" wide range. This is how I have Lilja flute my barrels and over a 30" barrel length you will loose 3/4 lb of barrel weight while not loosing any stiffness or accuracy potential. Plus you have the flutes to aid more rapid barrel cool down. I will be honest and say I have not played with the octogon and polygonal barrels much and certainly not enough to tell you I recommend them. Gary is the one to ask that question to find out the benefits of this system. I use Liljas 3 groove system and have never had a reason to change, amazing accuracy, great throat life and higher velocities then conventional rifling with less bore fouling as well. Well, bore fouling is simply not an issue with any Lilja barrel if they are broken in properly. So yes I would certianly go with a longer heavier barrel. I just got in my personal Lilja 30" 257 barrel for my 257 Allen Magnum rifle. This rifle will be a project in seeing how light I can build one of my extreme sporters in the round without loosing any balancing qualities or performance in velocity or accuracy. The barrel is still a #6 contour but I had it fluted with the heavy .312" wide flutes which bring the barrel weight down to an even 4.0 lbs! Quite light for a 30" #6 barrel. I will be using a McMillan BDL stock with their lightest fill and expect to get the rifle weight in the 8 1/4 lb range relatively easily. I will be using a full accurized Rem 700. This rifle will easily play with the 1/4 moa range at 100 yards and sub 1.5" groups at 500 yards with a point blank range nearly out to this range! Good Shooting!! Kirby Allen(50) [/QUOTE]
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