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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Barrel Contour and stock choices
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<blockquote data-quote="Buffalobob" data-source="post: 196027" data-attributes="member: 8"><p>Always good to know what you want and how you want to hunt with it.</p><p></p><p>A 27-28 inch barrel contour that tapers to about 0.65 - 0.7 inches at the muzzle will still point fairly well and swing well and can be fired off hand moderately well because it is still pretty well balanced. It will group well at long range as long as you don't get it hot which I will talk about in a minute. Such a barrel is referred to as a heavy sporter or light varmint barrel and is about a #4 or #5 Lilja contour (see his website). I just had a 27 inch #3 taken off and a 28 inch #5 put on and I wish I had gone to a #4. The #3 shot very well and was a pleasure to carry and handy in the timber. Maybe I should have stayed with the #3. Oh well, not much of a mistake.</p><p></p><p>Barrel heating up is one of the great rural myths of the hunting world. The urban myths do not include barrel diameter so it had to be a rural myth.<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin :D" loading="lazy" data-shortname=":D" /> The only place that one is concerned with barrel heat is on the inside of the barrel. The heat on the outside of the barrel is of no concern to anyone who knows anything. The transfer of heat from the burning of powder to the first very thin layer of metal in the throat is what ruins a barrel. There is considerable debate and scientific uncertainty as to the exact nature of the process that ruins a throat but it is my opinion that there are two methods of ruining a barrel. High-frequency-high-temperature heat cycling and low-frequency-moderate temperature heat cycling. With the high frequency method if you fire ten rounds in two minutes the throat gets hotter and hotter and in between each shot there is a reduction of temperature in the first thin layer of metal which causes the expansion and contraction to occur at very high temperatures. If you fire ten rounds spaced over 30 minutes the temperature peaks are lower and there should be less thermal cracking of the surface of the throat. One method ruins a barrel quickly and the other ruins it slowly. Thermal checking and cracking is unavoidable but you can reduce its affects by the rate of fire. In my opinion this is much more important than barrel thickness. So, if you would like a nice handling light barreled rifle remember to treat the throat kindly and it will be accurate for many years.</p></blockquote><p></p>
[QUOTE="Buffalobob, post: 196027, member: 8"] Always good to know what you want and how you want to hunt with it. A 27-28 inch barrel contour that tapers to about 0.65 - 0.7 inches at the muzzle will still point fairly well and swing well and can be fired off hand moderately well because it is still pretty well balanced. It will group well at long range as long as you don't get it hot which I will talk about in a minute. Such a barrel is referred to as a heavy sporter or light varmint barrel and is about a #4 or #5 Lilja contour (see his website). I just had a 27 inch #3 taken off and a 28 inch #5 put on and I wish I had gone to a #4. The #3 shot very well and was a pleasure to carry and handy in the timber. Maybe I should have stayed with the #3. Oh well, not much of a mistake. Barrel heating up is one of the great rural myths of the hunting world. The urban myths do not include barrel diameter so it had to be a rural myth.:D The only place that one is concerned with barrel heat is on the inside of the barrel. The heat on the outside of the barrel is of no concern to anyone who knows anything. The transfer of heat from the burning of powder to the first very thin layer of metal in the throat is what ruins a barrel. There is considerable debate and scientific uncertainty as to the exact nature of the process that ruins a throat but it is my opinion that there are two methods of ruining a barrel. High-frequency-high-temperature heat cycling and low-frequency-moderate temperature heat cycling. With the high frequency method if you fire ten rounds in two minutes the throat gets hotter and hotter and in between each shot there is a reduction of temperature in the first thin layer of metal which causes the expansion and contraction to occur at very high temperatures. If you fire ten rounds spaced over 30 minutes the temperature peaks are lower and there should be less thermal cracking of the surface of the throat. One method ruins a barrel quickly and the other ruins it slowly. Thermal checking and cracking is unavoidable but you can reduce its affects by the rate of fire. In my opinion this is much more important than barrel thickness. So, if you would like a nice handling light barreled rifle remember to treat the throat kindly and it will be accurate for many years. [/QUOTE]
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