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Barrel cooling devices / practices

 
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  #8  
Old 11-07-2011, 09:58 AM
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Re: Barrel cooling devices / practices

In long range competition shooting from prone, it's common to shoot 25 to 30 shots with each one about 20 to 30 seconds apart. Barrels from such firing heat up very much. If they're properly heat treated and fit to a receiver whose face is square with the bore/chamber axis, hot barrels don't hurt accuracy. They all maintain sub 3/4 MOA accuracy at 1000 yards. This is for the mild 6.5x.284 up through 30 caliber magnums.

I've shot 30 shots at 20 second intervals testing 30 caliber magnum loads at 1000 yards. All 30 went inside 6 inches. Friend of mine shot 40 shots at 600 yards also about 20 seconds apart; group was 1.92 inch. I put 20 rounds from a .308 Win. at 800 yards into 3.2 inches fired at the same rate. Love shooting fast with those super hot barrels made by Kreiger, Obermeyer and the older ones from Hart. And even those skinny Springfield Armory Arsenal match grade barrels made for 7.62 NATO Garands would hold 1 MOA accuracy at 1000 yards for 25 to 30 shots fired just as fast.

If you barrel shoots bullets to different points as it heats up, you might need to fix the receiver face. Or send the barrel back to its maker and ask for a replacement that's properly stress relieved by good heat treatment. Of course if these typical causes ain't the problem, then maybe you should check the shooter's long-term shooting technique for accuracy at the target.

Last edited by Bart B; 11-07-2011 at 10:06 AM.
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  #9  
Old 11-07-2011, 03:59 PM
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Re: Barrel cooling devices / practices

In the past when working up a load for a friend, I took a wet towel with me that I placed in a bucket with a couple inches of cold water in it. We were shooting three shot groups with several different COAL lengths and powder charges. It was early summer and pretty warm outside, we would have been spending way too much time waiting for the barrel to cool between groups if we had to just wait for the ambient temp. to cool the barrel off. I would just lay that cold damp towel over the entire length of the barrel and let it cool off between groups in order to keep things consistent. This worked great and we didn't stand around all day waiting for things to cool off.
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  #10  
Old 11-07-2011, 04:18 PM
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Re: Barrel cooling devices / practices

My favorite method of keeping the barrel cool was one I used as a teenager. We used to drag the kitchen table over to the front door of the house and shoot from the air conditioning. Mom was less than appreciative of this method, but it sure made summertime shooting more comfortable.
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  #11  
Old 11-07-2011, 05:43 PM
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Re: Barrel cooling devices / practices

I have a Coleman air matter pump. I just run that into the chamber and let'r blow. Works really well.
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  #12  
Old 05-10-2012, 07:31 AM
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Re: Barrel cooling devices / practices

Quote:
Originally Posted by Tumbleweed View Post
In the past when working up a load for a friend, I took a wet towel with me that I placed in a bucket with a couple inches of cold water in it. We were shooting three shot groups with several different COAL lengths and powder charges. It was early summer and pretty warm outside, we would have been spending way too much time waiting for the barrel to cool between groups if we had to just wait for the ambient temp. to cool the barrel off. I would just lay that cold damp towel over the entire length of the barrel and let it cool off between groups in order to keep things consistent. This worked great and we didn't stand around all day waiting for things to cool off.
Subesquent to posting the initial question I've tried this suggestion. Tumbleweed is right; it works great.

Thanks!
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  #13  
Old 05-11-2012, 06:47 AM
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Re: Barrel cooling devices / practices

It takes a long time for things to cool in Az especially in the summer. Tried wet towels but even that was too slow. Ended up making a CO2 system. The minimum size tank is 20 lb which is shown. Anything smaller and the cooling effect of releasing the compressed gas isn't there. Had to experiment with the correct regulator as well to get enough flow. The tip of the rubber hose is cut with a short taper and it wedges nicely in many chambers. It doesn't require max air flow but a good steady rate. Can cool a very hot magnum barrel in less than a minute. I will use this when I want to work up a load while ambient temps are still cool early in the morning. Can find out what the rifle likes in 1/2 hr.

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  #14  
Old 05-11-2012, 07:02 AM
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Re: Barrel cooling devices / practices

I'm sure it's common, but will say it anyway, old military method--cleaning rod down the barrel with bolt open....of course I use brass, but the big muzzle loader rod works best for my bigger bore weapons...

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