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Long Range Hunting & Shooting
Accuracy of a hot barrel?
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<blockquote data-quote="Fiftydriver" data-source="post: 419963" data-attributes="member: 10"><p>Most top end barrels that are properly stress relieved will shoot very well with a hot barrel. iF they do not, its is generally because of many possible problems:</p><p> </p><p>1. Stress in the barrel steel</p><p>2. Barrel contact with stock as it heats up and expands making shots walk.</p><p>3. Bullet/load/barrel combo is on the ragged edge for the bullet used and the added barrel heat is causing the bullet to suffer in flight, generally because of jacket core seperation.</p><p> </p><p>The main issue with a barrel getting hot is really not a concern of accuracy if the rifle is assembled properly and a good barrel is used with an appropriate bullet. The real problem with shooting in a hot barrel is throat life. </p><p> </p><p>Keep this in mind, shots 1-3 will do X amount of erosion to a throat, shot 4 will generally do as much as the first three shots. Shot 5 will double that, shot 6 will double that. </p><p> </p><p>Now I am talking about VERY small amounts of throat erosion but once the barrel heats up, throat erosion accelerates dramatically with follow up shots. Now this is certainly dependant to some degree on the intensity of the chambering. A 308 Win will have much less effect on bore temps then say a 7mm RUM.</p><p> </p><p>So to be honest, I would not recommend shooting in a hot barrel if at all possible to avoid weither the barrel shoots well or not, either way, it accelerates the damage to the throat when doing so.</p></blockquote><p></p>
[QUOTE="Fiftydriver, post: 419963, member: 10"] Most top end barrels that are properly stress relieved will shoot very well with a hot barrel. iF they do not, its is generally because of many possible problems: 1. Stress in the barrel steel 2. Barrel contact with stock as it heats up and expands making shots walk. 3. Bullet/load/barrel combo is on the ragged edge for the bullet used and the added barrel heat is causing the bullet to suffer in flight, generally because of jacket core seperation. The main issue with a barrel getting hot is really not a concern of accuracy if the rifle is assembled properly and a good barrel is used with an appropriate bullet. The real problem with shooting in a hot barrel is throat life. Keep this in mind, shots 1-3 will do X amount of erosion to a throat, shot 4 will generally do as much as the first three shots. Shot 5 will double that, shot 6 will double that. Now I am talking about VERY small amounts of throat erosion but once the barrel heats up, throat erosion accelerates dramatically with follow up shots. Now this is certainly dependant to some degree on the intensity of the chambering. A 308 Win will have much less effect on bore temps then say a 7mm RUM. So to be honest, I would not recommend shooting in a hot barrel if at all possible to avoid weither the barrel shoots well or not, either way, it accelerates the damage to the throat when doing so. [/QUOTE]
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Accuracy of a hot barrel?
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