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Hot barrel - what temp to stop shooting rounds

Jerry Snyder

I shoot a 6 dasher, 31.8 gr of Varget, 2880 fps.
I shoot two, 5 round strings and rest the barrel using a barrel cooler.
I shoot about 50 rounds each range trip.
Am I being to conservative and should I shoot more rounds between rest periods?
I have seen those temp stickers which give a ball park temp of the outside of the barrel.
Are those worth the money?
Also, at what temp would you stop and cool the barrel down?
Thanks
 
Right when it's too hot to touch, or just before that
Whatever temp that is ( I believe that is 130F depending on individual pain tolerance)
But I used to be a welder so I have some heat tolerance built in over the years.
So maybe kick it down to 120F
 
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Jerry Snyder said:
I shoot two, 5 round strings and rest the barrel using a barrel cooler.
I shoot about 50 rounds each range trip.
Am I being to conservative and should I shoot more rounds between rest periods?
Click to expand...
I'm cooling after one 5 round string.
However, it's a different cartridge (larger caliber) and the bullet is traveling almost 200fps faster
 
In F Class you generally shoot 20 shot strings with sighters in 20 minutes. Doesn't matter how hot it gets, unless you DNF you need to keep shooting. I say generally because long range allows 30 minutes and pair firing is 15 shots but you have to shoot your next shot within 45 second of the score being recorded for the person you are shooting with.

And of course how hot it gets and how rapidly depends on the caliber, the diameter of the barrel and the ambient temperature. When I'm shooting skinny barreled rifles, I usually shoot 3 shot groups and let it rest. When I'm shooting MTU or varmint contour barrel I'll usually shoot 10 and let it rest. I never measure the barrel temp. Not saying that is a good practice but it is the truth. I have used a barrel cooler from time to time in competition but it seems the batteries are always dead when I go to use it.
 
ArtinNC said:
I know what you are doing BUT it sounds BAD !!! ""fireforming 30BR in a 6MM barrel"" LOL
Click to expand...
Art, I do not like wearing out a new barrel. I have a fire forming barrel for most cartridges that I shoot. For this one I took one of my old 6ppc barrels and cut the threads off. I cut the tenon for the Defiance receiver, drilled and reamed the bore with a .300" reamer. I cut and threaded the tenon and used my 30BR Robinett reamer in to complete the chambering. Art, I'm now fire forming with 6mm bullets in a 6mm barrel. Jackie Schmidt has been using this method for years. I'm doing a 222 Remington Magnum Ackley Improved for my EL COYOTE rifle. I have an old 222 Remington 18" take off barrel and I will run my reamer into it to make my fire forming barrel.
I'm doing this because my bud, Wyman Meinzer, said that is the best coyote cartridge that he has ever used. He has accounted for over 3,000 coyotes, only 2,000 by rifle though. When you are close to 83 yrs old I need something to keep my blood pumping and the rust off my machine tools.

I should have said I ran the .300" reamer just enough for the chambering reamer to engage only.
 
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I read an article, that some guys would take a garden sprayer of ice water shooting. Fit a nipple to the hose that fits in barrel chamber to keep action dry. And then spray cold water through barrel untill cool. Then wipe dry with patch and carry on. They said the barrel fans work if you have the time to wait.
Figured id pass that along. It was an interesting read, and concept.
 
ronsatspokane said:
In F Class you generally shoot 20 shot strings with sighters in 20 minutes. Doesn't matter how hot it gets, unless you DNF you need to keep shooting. I say generally because long range allows 30 minutes and pair firing is 15 shots but you have to shoot your next shot within 45 second of the score being recorded for the person you are shooting with.

And of course how hot it gets and how rapidly depends on the caliber, the diameter of the barrel and the ambient temperature. When I'm shooting skinny barreled rifles, I usually shoot 3 shot groups and let it rest. When I'm shooting MTU or varmint contour barrel I'll usually shoot 10 and let it rest. I never measure the barrel temp. Not saying that is a good practice but it is the truth. I have used a barrel cooler from time to time in competition but it seems the batteries are always dead when I go to use it.
Click to expand...
My barrel is a Bartlein MTU contour.
 
butchlambert said:
Art, I do not like wearing out a new barrel. I have a fire forming barrel for most cartridges that I shoot. For this one I took one of my old 6ppc barrels and cut the threads off. I cut the tenon for the Defiance receiver, drilled and reamed the bore with a .300" reamer. I cut and threaded the tenon and used my 30BR Robinett reamer in to complete the chambering. Art, I'm now fire forming with 6mm bullets in a 6mm barrel. Jackie Schmidt has been using this method for years. I'm doing a 222 Remington Magnum Ackley Improved for my EL COYOTE rifle. I have an old 222 Remington 18" take off barrel and I will run my reamer into it to make my fire forming barrel.
I'm doing this because my bud, Wyman Meinzer, said that is the best coyote cartridge that he has ever used. He has accounted for over 3,000 coyotes, only 2,000 by rifle though. When you are close to 83 yrs old I need something to keep my blood pumping and the rust off my machine tools.

I should have said I ran the .33" reamer just enough for the chambering reamer to engage only.
Click to expand...
Like I said I know what you were doing , it just sounded bad .
 
Charlie-NY said:
If you shoot a barrel until the exterior surface is 140 deg, how hot might the bore be??
Click to expand...
Depends on how long after a shot you measured it.

My SWAG is the surface of the bore 1 minute after the shot is very close to the temperature of the exterior surface.

In my SWAG model, it wouldn't matter much to the bore when the exterior is just 40-70* hotter.
I'm thinking what fries the bore is the 3000+ temp of the flame. Another 40-70 degrees just isn't going to be noticed in the bore.
 
I don’t know what temp. I use a calendar to do the calculations usually.

The equation goes as follows:

From mid June through mid September, go to the lake, and golf course. Beer in hand. Then light the coals and shade up.

Edit* unless you’re up and shooting at sunrise because the urge is too great, which will happen. But then still refer to the above formula and head to the lake/course immediately thereafter. With a beer. Summer is dumb but it’s manageable if you’re careful. The temp should always be < 70° for enjoying the most important of hobbies. Your barrel will thank you.
 
Jerry Snyder said:
My barrel is a Bartlein MTU contour.
Click to expand...
6 Dasher is a good all around caliber. I know people who have won benchrest matches with it as well as F Class matches. The administrator of this site is one of them who has won both with a Dasher. You should compete with it.
 
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