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Proof Carbon Barrel Cooling
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<blockquote data-quote="dennisinaz" data-source="post: 1708785" data-attributes="member: 40966"><p>you guys that are stating that cooling the barrel too fast is going to ruin it are way off base. How fast do you think it heats up when you touch off a shot? We get anywhere from 500-5000 shots out a barrel before it is "ruined" by torching it with 3000 degree hot gasses (or whatever the exact temp is-some smokeless powders burn at 5000 F)</p><p></p><p>A friend of mine who is an ammunition manufacturer has used CO2 for many years to cool barrels down quickly. You blast them for a certain amount of time and then let them stabilize for 60 seconds or so.</p><p></p><p>I only use CO2 on nice walnut stocked rifles. My preferred method as AZshooter eluded too is to use ice water. I fill a 3 gallon Igloo cooler with ice from the ice machine and then fill it with DI water. As soon as I feel a barrel getting hot I walk over and hold it under the spigot, starting with the shank and working my way down to the muzzle. I then wipe it off with a towel and blow the water out from in between the stock and barrel. I wait 30 seconds and go back to firing.</p><p>Anyone who thinks taking a 416SS barrel from 140 degrees to 40 degrees in 20 seconds is going to have ANY detrimental effect on the metallurgy is very uninformed.</p><p></p><p>I know a couple of guys who use dry ice and alcohol to cool their barrels. They have deeper pockets than I do I guess!</p><p>I like to keep my range sessions as short as possible and in the summer here in Phx, you will wait forever and the barrel with still be hot! I've been doing this for years and it has had no bad effects and all good effects.</p><p></p><p>If You chill the barrel to minus 200 and then fire it I believe damage is likely. The cool temps I take my barrels too will never, ever have any ill effects.</p><p>I rarely ever only take one rifle to the range. I shoot one and cool it- letting it normalize while I shoot another rifle- often times mid-group on a real hot day and a light contour barrel. It sure speeds things up.</p><p></p><p>I just don't like to do it with wood stocks. If a rifle is full length bedded (Barrett Field craft for example) I make sure I let it sit at least 60 seconds so that the temperature can equalize all the way around the barrel. With a good floated barrel, the water runs all the way around it. I put the rifles away hot so that I know all the moisture has baked out at the end of the day.</p></blockquote><p></p>
[QUOTE="dennisinaz, post: 1708785, member: 40966"] you guys that are stating that cooling the barrel too fast is going to ruin it are way off base. How fast do you think it heats up when you touch off a shot? We get anywhere from 500-5000 shots out a barrel before it is "ruined" by torching it with 3000 degree hot gasses (or whatever the exact temp is-some smokeless powders burn at 5000 F) A friend of mine who is an ammunition manufacturer has used CO2 for many years to cool barrels down quickly. You blast them for a certain amount of time and then let them stabilize for 60 seconds or so. I only use CO2 on nice walnut stocked rifles. My preferred method as AZshooter eluded too is to use ice water. I fill a 3 gallon Igloo cooler with ice from the ice machine and then fill it with DI water. As soon as I feel a barrel getting hot I walk over and hold it under the spigot, starting with the shank and working my way down to the muzzle. I then wipe it off with a towel and blow the water out from in between the stock and barrel. I wait 30 seconds and go back to firing. Anyone who thinks taking a 416SS barrel from 140 degrees to 40 degrees in 20 seconds is going to have ANY detrimental effect on the metallurgy is very uninformed. I know a couple of guys who use dry ice and alcohol to cool their barrels. They have deeper pockets than I do I guess! I like to keep my range sessions as short as possible and in the summer here in Phx, you will wait forever and the barrel with still be hot! I've been doing this for years and it has had no bad effects and all good effects. If You chill the barrel to minus 200 and then fire it I believe damage is likely. The cool temps I take my barrels too will never, ever have any ill effects. I rarely ever only take one rifle to the range. I shoot one and cool it- letting it normalize while I shoot another rifle- often times mid-group on a real hot day and a light contour barrel. It sure speeds things up. I just don't like to do it with wood stocks. If a rifle is full length bedded (Barrett Field craft for example) I make sure I let it sit at least 60 seconds so that the temperature can equalize all the way around the barrel. With a good floated barrel, the water runs all the way around it. I put the rifles away hot so that I know all the moisture has baked out at the end of the day. [/QUOTE]
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