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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Cooling a barrel 🤔
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<blockquote data-quote="cabelasken" data-source="post: 2193447" data-attributes="member: 117774"><p>My custom rifle maker gave me this procedure for his newly installed barrels. Clean, shoot - repeat 10 to 12 times. then clean, shoot 3 shot groups - repeat 3 to 4 times. then your good to go. I did this for the three custom lightweight hunting rifles he made for me and they all can produce 1/2 MOA 5 shot 100 yd groups. That said, the custom 300 WSM took 100 rounds before it got under 1 MOA and nearly 200 rounds to get to under 1/2 MOA with identical loads. That barrel apparently had a manufacturing flaw that my rifle maker and I didn't see, but it is no longer there. I've seen this break in procedure or a similar version of it from many different sources, so I've been doing this for the past 25 years.</p><p></p><p>At the range on a hot day, I've draped a moist towel over the length of the barrel and let it sit for several minutes to cool a barrel. I've also used a computer cleaner aerosol spray to blow out the hot gasses from the receiver thru the barrel. I would not put anything too cold thru a hot barrel as I know when we stress relieve welds on pipelines, it is under a slow and controlled procedure, like under 200 degrees per hour.</p></blockquote><p></p>
[QUOTE="cabelasken, post: 2193447, member: 117774"] My custom rifle maker gave me this procedure for his newly installed barrels. Clean, shoot - repeat 10 to 12 times. then clean, shoot 3 shot groups - repeat 3 to 4 times. then your good to go. I did this for the three custom lightweight hunting rifles he made for me and they all can produce 1/2 MOA 5 shot 100 yd groups. That said, the custom 300 WSM took 100 rounds before it got under 1 MOA and nearly 200 rounds to get to under 1/2 MOA with identical loads. That barrel apparently had a manufacturing flaw that my rifle maker and I didn't see, but it is no longer there. I've seen this break in procedure or a similar version of it from many different sources, so I've been doing this for the past 25 years. At the range on a hot day, I've draped a moist towel over the length of the barrel and let it sit for several minutes to cool a barrel. I've also used a computer cleaner aerosol spray to blow out the hot gasses from the receiver thru the barrel. I would not put anything too cold thru a hot barrel as I know when we stress relieve welds on pipelines, it is under a slow and controlled procedure, like under 200 degrees per hour. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Cooling a barrel 🤔
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