Bull Barrel Advantages

BigRed I did not go to a school with flowers on the side so if you still want to argue I challenge you to dis prove what I have said. I'll even supply some good references!!!!!!!!!!!!!

osborne
 
I read these tests with ovens and talk of torches and ####...We are talkign heating barrels up with BULLETS traveing INSIDE thier bore, not an oven or torch from the outside in.....

.Why not simply:

Use a laser thermometer. I use them all the time at work..they are no mystery.

Take 2 rifles, each int he same chambering, one HB, one light.

Measure and record temps of each barrel.(it should simply be the ambient temperature of the day)

Shoot the light barrel 3 times. Check the temp. Set aside and start the clock. Record the time it takes to get back to the original temp.

Shoot the HB a few times, to heat to the same temp as the light barrel got to with 3 shots. It will probaby take alot more than 3 to get tot he same temp:)

When it gets there, start the clock and see how long it takes to get back to the original temp....

Now you will have how many shots it takes to heat up the HB compared to the LB, and you will know which cools faster, too.

So then you can decide which is more efficient to shoot.:)
 
Shoot the light barrel 3 times. Check the temp. Set aside and start the clock. Record the time it takes to get back to the original temp.
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And one would have to set it aside under the exact same conditions, ie. in the sun, or out, same wind blowing on them, same material it would be placed onto. :)
 
Levi Garrett said:
And one would have to set it aside under the exact same conditions, ie. in the sun, or out, same wind blowing on them, same material it would be placed onto. :)
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That is not tough to achieve. Stand it up in the same rack at the range. Under cover/sheter to minimize any differences in weather.

At my range it wodl be easy to duplicate conditions. Not so if you are shooting in an open area and it is widy and sunny and raining all at the same time.:p
 
Hahaha, yeah, I should go do some work or something and stop hanging out on CGN so much... Just remember, BIGREDD's wrong ;)
 
So if the bull barrel has more surface area then it will cool faster, more surface area the faster the heat dissapates. Grade 6 science.
 
adog said:
So if the bull barrel has more surface area then it will cool faster, more surface area the faster the heat dissapates. Grade 6 science.
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But it will also have more stored heat energy which it needs to dissipate - assuming it starts at the same temperature as the sporter barrel, and the goal is to return it to ambient temperature rather than just cool enough to resume shooting...
 
But it will also have more stored heat energy which it needs to dissipate - assuming it starts at the same temperature as the sporter barrel, and the goal is to return it to ambient temperature rather than just cool enough to resume shooting...
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And that would mean both barrels feel the same to the touch, but the core of the bull barrel is hotter than the sporter weight barrel. :D
 
Hey You guys are just gonna give the special kids a headache.... Prosper is working on a degree in burger flipping and he can't waste the brain cells.:p
Still waiting for some proof brainwave....:confused:
 
Yes levi through a stringent heat transfer analysis there is a radial temperture gradient, the inner core is hooter than the outer surface. However in this case the extremely high conduction heat transfer coefficent and small radius mean that this difference will be very small. Essentially the heat moves fast enough radially in the barrel to to keep the temperature almost the same.

This is why a few pages back when I did a few calculations I assumed the barrels were isothermal. My heat transfer book is at work, I'll be able to give you an idea of the temperature difference monday night if work isn't busy!!

osborne
 
I know there is a lot more to it, but I always thought rifle manufacturers made fluted barrels because they cooled faster because of the increased surface area like the cooling fins on electronics and radiators. I wasn't trying to be 100% scientifically correct in my post but I am pretty sure it is the basic idea. I hope someone does this experiment just to see whose opinion is right.
 
Flutes do certinaly help. They greatly increase surface area when compared to a bull barrel of the same outer diameter. The increased surface area and reduction in amount of steel allow the fluted barrel to cool much faster than the bull barrel. does it cool faster than a barrel of smaller diameter?? I dunno. You now have a more compicated problem again, which isn't that bad to figure out, but I need to get some work done at work!!!!
 
I worked my way through all this stuff, and once again Gate has answered with good common sense. When shooting we do not aspire to shoot until the barrels reach their maximum temperature, rather we shoot a fixed number of rounds - and in competition shooting the rounds can be sent down range very quickly so that conditions do not change while the group is being fired. When you fire a group, a fixed number of rounds, of the same caliber and load, at the same rate of fire - the heavy barrel will not be as hot as the sporter, and therefore as Gate said - it will return to the ambient temperature sooner. If you want to argue which takes longer to cool - a steel pipe or a anvil when both are heated to cherry red - right or wrong, it has little to do with shooting
 
If both barrels are heated throughout to the same temperature, the lighter one will return to ambient temperature quicker.

If both barrels fire the same number of rounds, the heavy barrel will have a lower temperature throughout, and will return to ambient temperature quicker.

So everyone is right in a way, the question needs to be framed a little clearer. Are we asking:

1. Does a heavy barrel cool quicker from a specific temperature? (no)

OR

2. Does a heavy barrel cool quicker after a specific number of shots? (yes)
 
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