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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Clean bore vs. Fouled bore?
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<blockquote data-quote="Andrew Cowling" data-source="post: 1686309" data-attributes="member: 109547"><p>As a smith I get asked this a lot. It really comes down to the quality of the barrel. </p><p></p><p>Leaving copper in for long periods of time, especially in damp environments, can cause electrolysis between the copper and steel of the barrel eating the bore away. Seen way to many stuffed barrels due to this to not be cleaning.</p><p></p><p>Clean cold, dirty cold or dirty hot with a good quality barrel the point of impact will remain the same. I get a lot of clients coming to me complaining about the shots "walking" up the target as consecutive shots were fired. So, check the barrel chanel and bedding first. A floated barrel and good tight bedding has improved a lot of them.</p><p></p><p>Had a few barrels that still after the improvements had shots still "walk" as the barrel heated up and fouled up, although better than before the improvements were done. So changed the barrel out for a good quality unit that was lapped and correctly stress relieved. After a proper running in, now the clean cold shot to dirty fouled and hot shot is exactly the same point of impact. Clients can rely on the first shot being the the same as the last and because it is such good quality there is very little to no copper fouling after 50 shots fired. Borescope said it all.</p><p></p><p>So, it will come down to the quality of the barrel on your rifle. I sold a rifle not long ago to my young off sider. A 1970's Parker Hale 98 mauser in 7x57 in a light weight profile. Bore was mint with no machining marks found. Shots walked all over the target at 100 metres. So I floated the original wooden stock and gave it a great tight bedding job and a good recoil pad. Adding to this I cleaned the bore completely of all fouling and we proceeded to go through a complete running in cycle as if it was a new barrel. Well bugger me!!! That barrel settled down and now the clean cold first shot hits the same point as a hot dirty shot. 20 rounds got the barrel hot enough to not be able to hold onto yet a 6 inch disc at 300 meters was being consistently hit.</p><p></p><p>Me, I like my barrels clean but I also know that each one will hit and maintain the same point regarless.</p></blockquote><p></p>
[QUOTE="Andrew Cowling, post: 1686309, member: 109547"] As a smith I get asked this a lot. It really comes down to the quality of the barrel. Leaving copper in for long periods of time, especially in damp environments, can cause electrolysis between the copper and steel of the barrel eating the bore away. Seen way to many stuffed barrels due to this to not be cleaning. Clean cold, dirty cold or dirty hot with a good quality barrel the point of impact will remain the same. I get a lot of clients coming to me complaining about the shots "walking" up the target as consecutive shots were fired. So, check the barrel chanel and bedding first. A floated barrel and good tight bedding has improved a lot of them. Had a few barrels that still after the improvements had shots still "walk" as the barrel heated up and fouled up, although better than before the improvements were done. So changed the barrel out for a good quality unit that was lapped and correctly stress relieved. After a proper running in, now the clean cold shot to dirty fouled and hot shot is exactly the same point of impact. Clients can rely on the first shot being the the same as the last and because it is such good quality there is very little to no copper fouling after 50 shots fired. Borescope said it all. So, it will come down to the quality of the barrel on your rifle. I sold a rifle not long ago to my young off sider. A 1970's Parker Hale 98 mauser in 7x57 in a light weight profile. Bore was mint with no machining marks found. Shots walked all over the target at 100 metres. So I floated the original wooden stock and gave it a great tight bedding job and a good recoil pad. Adding to this I cleaned the bore completely of all fouling and we proceeded to go through a complete running in cycle as if it was a new barrel. Well bugger me!!! That barrel settled down and now the clean cold first shot hits the same point as a hot dirty shot. 20 rounds got the barrel hot enough to not be able to hold onto yet a 6 inch disc at 300 meters was being consistently hit. Me, I like my barrels clean but I also know that each one will hit and maintain the same point regarless. [/QUOTE]
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Clean bore vs. Fouled bore?
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