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Did anyone run any scientific tests which show the effectiveness of blowing down the barrel in a traditional ML gun? Probably not.
The term cook off would mean:
the barrel became so hot from shooting that it would ignite the powder just dumped in the barrel. If a barrel really gets this hot (at reenactments where you only shoot powder your barrel can get super hot during a battle)one would burn his lips just touching the barrel then. Definetely not recommended.
Cook offs occur in automatic weapons, if the operator does not change the barrel in regular intervals. For example at an air cooled machine gun, you are supposed to change the barrel every 150 shots or so,when you shot it without interruptions. And you better use a heat proof glove to touch the thing!
If you don't change the barrel, the next cartridge could actually cook off because the powder would ignite because of the heat of the barrel chamber. This is an uncontrolled ignition of your cartridge and may lead to problems.
Deflagration can not occur with black powder, because it is a mass explosive.
Accidential ignition of the powder charge because of a residual glowing amber from the previous shot can be prevented with several other methods than blowing down the barrel. A moist patch will do the same for example.
Blowing down the barrel does 4 things imho:
1.It softens the fouling because you blow in moist air
2. It shows that your touch hole/ignition channel is not obstructed by fouling.
3. It helps to load a second shot without cleaning because of the softened fouling
4. It may blow enough oxygen in there, that the obscure residual glowing amber combusts fully and gets blown out.
The last point is a maybe or maybe not. I would like to see that tested in a clear tube, similar like they show the spin jag working the rifling with the patch better than a normal jag.
Personally, I do the blowing down the barrel on my private range for points 1-3 or I use a moist patch.
The 4th point for me is like the old wife's tail in archery, that the cock feather should point out or that a right-handed archer needs right-wing feathers and a left-handed archer needs left-wing feathers on his arrow.
These old wifes tales were proven to be wrong by intensive industry testing procedures.
And I think we should stop the blowing down the barrel discussion in this thread.
The term cook off would mean:
the barrel became so hot from shooting that it would ignite the powder just dumped in the barrel. If a barrel really gets this hot (at reenactments where you only shoot powder your barrel can get super hot during a battle)one would burn his lips just touching the barrel then. Definetely not recommended.
Cook offs occur in automatic weapons, if the operator does not change the barrel in regular intervals. For example at an air cooled machine gun, you are supposed to change the barrel every 150 shots or so,when you shot it without interruptions. And you better use a heat proof glove to touch the thing!
If you don't change the barrel, the next cartridge could actually cook off because the powder would ignite because of the heat of the barrel chamber. This is an uncontrolled ignition of your cartridge and may lead to problems.
Deflagration can not occur with black powder, because it is a mass explosive.
Accidential ignition of the powder charge because of a residual glowing amber from the previous shot can be prevented with several other methods than blowing down the barrel. A moist patch will do the same for example.
Blowing down the barrel does 4 things imho:
1.It softens the fouling because you blow in moist air
2. It shows that your touch hole/ignition channel is not obstructed by fouling.
3. It helps to load a second shot without cleaning because of the softened fouling
4. It may blow enough oxygen in there, that the obscure residual glowing amber combusts fully and gets blown out.
The last point is a maybe or maybe not. I would like to see that tested in a clear tube, similar like they show the spin jag working the rifling with the patch better than a normal jag.
Personally, I do the blowing down the barrel on my private range for points 1-3 or I use a moist patch.
The 4th point for me is like the old wife's tail in archery, that the cock feather should point out or that a right-handed archer needs right-wing feathers and a left-handed archer needs left-wing feathers on his arrow.
These old wifes tales were proven to be wrong by intensive industry testing procedures.
And I think we should stop the blowing down the barrel discussion in this thread.