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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Barrel broke in?
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<blockquote data-quote="Andrew Cowling" data-source="post: 2194672" data-attributes="member: 109547"><p>As a smith I build a lot of rifles. Most of the time the client asks me to run a barrel in.</p><p>I let the barrel tell me when it is ready by the amount of copper fouling and how easy it is to remove.</p><p>My process may take a little longer but the results speak for them selves.</p><p>I shoot 1 shot and clean using a well soaked nylon brush with sweets 7.62. I do this for 10 shots. Then I will fire a 3 shot string and clean again for 5 strings. If there is still a lot of copper being deposited then I procede to shoot 5 x 5 shot string and clean between each string. Each time a inspect the bore before and after cleaning. As the barrel is run in I notice that there is less copper fouling. When the fouling is removed completely I take note of how much time it has taken for that clean.</p><p>Once the barrel reaches a point that it hardly has any copper in it from a string and the clean up is very quick, then and only then do I concider the barrel to be run in.</p><p>When the barrel stops getting badly fouled with copper then it will give you consistent SD,s and velocities which translates to tighter groups. Also the tighter groups will remain for longer.</p></blockquote><p></p>
[QUOTE="Andrew Cowling, post: 2194672, member: 109547"] As a smith I build a lot of rifles. Most of the time the client asks me to run a barrel in. I let the barrel tell me when it is ready by the amount of copper fouling and how easy it is to remove. My process may take a little longer but the results speak for them selves. I shoot 1 shot and clean using a well soaked nylon brush with sweets 7.62. I do this for 10 shots. Then I will fire a 3 shot string and clean again for 5 strings. If there is still a lot of copper being deposited then I procede to shoot 5 x 5 shot string and clean between each string. Each time a inspect the bore before and after cleaning. As the barrel is run in I notice that there is less copper fouling. When the fouling is removed completely I take note of how much time it has taken for that clean. Once the barrel reaches a point that it hardly has any copper in it from a string and the clean up is very quick, then and only then do I concider the barrel to be run in. When the barrel stops getting badly fouled with copper then it will give you consistent SD,s and velocities which translates to tighter groups. Also the tighter groups will remain for longer. [/QUOTE]
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Rifles, Bullets, Barrels & Ballistics
Barrel broke in?
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