JLDickmon
Member
I'm leaving that one alone..
Random question i've never heard a good answer to
- Thread starter mattamus1987
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mattamus1987
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- Apr 12, 2010
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Ok fair enough, I dont own an M1 or any other auto loading 30-06, mine is in fact a bolt gun. Next time I see someone shooting a M1 im gonna scoop up his brass right after fired and squeeze it as hard as I can in my fist. Maybe that will shut me up!
Right.
The cases frome 223 Remington fired in my cold AR come out hot enough to burn my hands yet those same 223 Remington loads fired in my bolt 223 Reminton are only warm to the touch.
The extra time the case stays in the bolt rifle allows the heat to transfer.
Same for cases fired from semi-auto and bolt rifles in 308 Win and 30-06.
rcmodel
Member in memoriam
Use your bare hand to catch your buddy's little .45 ACP, 9mm, or .380 pistol cases out of ejection mid-flight sometime.
(You know it beats crawling around on the ground picking up brass, right!)
I GayRon-TeeYa it won't take you long to look at it!!
Yet amazingly, .44 Magnum cases are almost cool to the touch when you eject them out of a revolver cylinder.
Or take for instance a .22 LR case, hot out of a semi-auto pistol or rifle down your shirt collar!
You will be stripping down to your shorts right there on the range in front of everybody to get it off your baby soft & tender white belly skin!!
The same exact .22 LR case out of a bolt-action or revolver isn't even warm.
rc
(You know it beats crawling around on the ground picking up brass, right!)
I GayRon-TeeYa it won't take you long to look at it!!
Yet amazingly, .44 Magnum cases are almost cool to the touch when you eject them out of a revolver cylinder.
Or take for instance a .22 LR case, hot out of a semi-auto pistol or rifle down your shirt collar!
You will be stripping down to your shorts right there on the range in front of everybody to get it off your baby soft & tender white belly skin!!
The same exact .22 LR case out of a bolt-action or revolver isn't even warm.
You can bet on it!!
rc
highlander 5
Member
Anyone ever have a 45 ACP case go down thier shirt? That will get your attention real fast,but the same round fired from a 625 is cool maybe warm to the touch upon extraction.
tbob38
Member
You live anywhere near SW Utah? We can settle this real quick.
rcmodel
Member in memoriam
Or, you could go to a machinegun shoot sometime, and lay your bare arm under a Browning 30-06 MG for a full belt or two.
You will be going to the ER for burn treatment afterward to get the 30-06 GI head-stamp tattoo burns off your arm!
rc
You will be going to the ER for burn treatment afterward to get the 30-06 GI head-stamp tattoo burns off your arm!
rc
hAkron
Member
Wouldn't the operation of an AR or AK type of rifle be hotter in general because rather than expelling the hot gasses all out of the muzzle end, some of the gasses are cycled back through the gun to operate 'gas operated' parts of the gun? Would any of that hot gas reach the spent case?
With a cold gun, no, the gases from an AR do not directly impinge on the cartridge but inside of the bolt.
Of course, as an AR fires more rounds, the gas will heat up the bolt. But the ejected case is still hot when ejected from a cold gun.
I believe an AK is a piston gun and no gasses get into the bolt from the gas system so the action takes a bit longer to heat up. Corrections greatly accepted on the AK accepted if necessary.
Of course, as an AR fires more rounds, the gas will heat up the bolt. But the ejected case is still hot when ejected from a cold gun.
I believe an AK is a piston gun and no gasses get into the bolt from the gas system so the action takes a bit longer to heat up. Corrections greatly accepted on the AK accepted if necessary.
rcmodel
Member in memoriam
No.
All types of gas operated firearms use expanding hot powder gas to operate the action.
That generally occurs 10" - 14" up the barrel on a rifle, where the gas port is drilled into the bore.
In an AK, or AR, none of the hot gas from the gas port in the barrel reaches the fired case.
In an AK, the gas piston cycles and the hot gas is expelled well in front of the chamber.
With an AR, the gas is directed back through the gas tube, into the bolt carrier, where it drives the bolt carrier backward off the bolt to unlock it and allow case extraction and ejection.
Yes, a DI AR-15 runs hotter then a GP AK-47.
But neither one has anything to do with transferring heat to the fired case.
By the time the hot gas gets to the gas port in the barrel to do anything, the bullet is gone, the fire inside the chamber is out, and the pressure has already dropped enough to allow case extraction.
As a matter of fact, the fired case carrying off heat from a full-auto firearm is a design criteria.
If the brass didn't carry excess heat out of the gun fast as it was fired?
The gun would eventually melt.
Food for thought:
An AR-15 can cycle at 750 to 1,000+ rounds per minute in full auto operation.
For the math challenged like me?
Thats 12.5 to 17+ rounds per second getting fired and ejected, per second.
How much heat transfer from the case to the chamber to cool the cases do you think can happen in that length of time??
Or, lets see you run a bolt action that fast and eject hot cases!
rc
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colorado_handgunner
Member
Had a 40 wedge between my safety glasses and temple once. Got a decent burn. Had the piece of mind to place weapon facing down range first before removing though, hence the burn.
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