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AR15.COM
11/3/2005 7:47:24 PM EDT
If you had a Mauser in, say, .308, and it had a 100 yard bbl, would the bullet reach the end of the bbl and exit when fired?  If so, what about a 10,000 yard bbl?

11/3/2005 7:49:25 PM EDT
[#1]
It would jam due to the fact that a barrel that long won't remain straight enough.  too much sag.  100 yards, properly support, okay.   10,000 yards - no chance.


also, the bullet won't go as far as it would in the air, due to friction
11/3/2005 7:50:13 PM EDT
[#2]

Quoted:
It would jam due to the fact that a barrel that long won't remain straight enough



Assume it was supported evenly.
11/3/2005 7:51:20 PM EDT
[#3]
Properly supported, 100 yards - yes


500 yards, doubt it


10,000 yards, no chance


too much friction in the barrel
11/3/2005 7:53:03 PM EDT
[#4]
well.. i can't calculate the distance, but eventualy, the pressure from the powder charge would not be able to overcome the friction of the round against the barrel and it would stop.
11/3/2005 7:54:08 PM EDT
[#5]
Why?
11/3/2005 7:54:13 PM EDT
[#6]
It would be a waste of a barrel after a couple of feet.

I dont even know if ther is enough gas to fill a barrel .3"x 300' and have enough pressure to even proble the bullet more than 6" out the end
11/3/2005 7:59:16 PM EDT
[#7]
What if....It was a 20in. barrel, with a 99yd. 16in. flash hider?

11/3/2005 8:01:49 PM EDT
[#8]
Ok, what if...

You had a 12 foot radius tunnel drilled directly through the center of the earth.  It is a direct, straight shot through the center.

This tunnel is insulated from all heat and pressure and stays at a comfortable 75 degrees at every point inside it.  The walls are also generously padded.

What would happen if you jumped down it feet first?
11/3/2005 8:03:17 PM EDT
[#9]
The bbl question, no reason for it really, just bored and don't want to work on homework...
11/3/2005 8:03:52 PM EDT
[#10]
I speculate that the bullet would never make it out of a 100 yard barrel.  The friction of the bullet/barrel interface might be enough to stop it before it got to 100 yards.

I mean, wouldn't the bullet be decelerating after the second yard?
11/3/2005 8:04:48 PM EDT
[#11]

Quoted:
Ok, what if...

You had a 12 foot radius tunnel drilled directly through the center of the earth.  It is a direct, straight shot through the center.

This tunnel is insulated from all heat and pressure and stays at a comfortable 75 degrees at every point inside it.  The walls are also generously padded.

What would happen if you jumped down it feet first?




You'd be crushed as the gravity increase, as I recall.


They just showed this on Discovery.
11/3/2005 8:05:24 PM EDT
[#12]
Just curious if the bullet could make it through a 100 yd bbl.
11/3/2005 8:05:46 PM EDT
[#13]
Wow think of the accuracy at 100 yards! Hole through hole!
11/3/2005 8:06:36 PM EDT
[#14]
Well, what about a cannon ball?  Would it float in the center of the tunnel at the center of the earth?
11/3/2005 8:09:32 PM EDT
[#15]
Have you been pondering the possibilities of the Joker's revolver in Batman?

Really, it is kinda irrelevant.
11/3/2005 8:09:46 PM EDT
[#16]
Say a human could survive the pressure of the gravity at the center of the Earth.

If you were floating at the center, would you feel like you were upside down, or rightside up?  Would the blood rush to your head and your feet at the same time?
11/3/2005 8:11:18 PM EDT
[#17]

Quoted:
Have you been pondering the possibilities of the Joker's revolver in Batman?

Really, it is kinda irrelevant.



Pondering hypothetical physics issues is irrelevant?  

Nahh, it's cool...
11/3/2005 8:14:30 PM EDT
[#18]
Maybe kids today should ponder these things more often in school.  I'm sure most kids today would say the cannon ball would come out the other end...
11/3/2005 8:15:11 PM EDT
[#19]

Quoted:
Have you been pondering the possibilities of the Joker's revolver in Batman?




11/3/2005 8:16:36 PM EDT
[#20]

Quoted:
Have you been pondering the possibilities of the Joker's revolver in Batman?

Really, it is kinda irrelevant.



Actually, it was my next build project...
11/3/2005 8:17:43 PM EDT
[#21]

Quoted:
Just curious if the bullet could make it through a 100 yd bbl.



no.


There isn't enough gas produced to push the bullet out the end.




Ok I really want to figure this out.

does anyone know how many moles of gas is produced from the burning of a stanturd .308 load
11/3/2005 8:19:56 PM EDT
[#22]

Quoted:

Quoted:
Just curious if the bullet could make it through a 100 yd bbl.



no.


There isn't enough gas produced to push the bullet out the end.



How much of the copper jacket would be stripped off through a bbl that long?  
11/3/2005 8:22:39 PM EDT
[#23]

Quoted:
Maybe kids today should ponder these things more often in school.  I'm sure most kids today would say the cannon ball would come out the other end...


I think it would, it would keep oscillating back and forth through the center, eventually coming to a stop, much like a pendulum.
11/3/2005 8:23:39 PM EDT
[#24]

Quoted:

Quoted:
Maybe kids today should ponder these things more often in school.  I'm sure most kids today would say the cannon ball would come out the other end...


I think it would, it would keep oscillating back and forth through the center, eventually coming to a stop, much like a pendulum.



Right, it would yo-yo to a stop in the center, when it lost all its momentum.
11/3/2005 8:25:11 PM EDT
[#25]

Quoted:

Quoted:
Have you been pondering the possibilities of the Joker's revolver in Batman?

Really, it is kinda irrelevant.



Actually, it was my next build project...



got any face paint? Have you ever fell in acid? Have you ever looked at a single-engine cessna flying by and thought "hold my beer and watch this"? If so, this project might be for you. Just look out for crazy anghst-ridden psychos in spandex. They might supply the cessna, but in the end they will take your fun away.
11/3/2005 8:27:39 PM EDT
[#26]

Quoted:

Quoted:
Maybe kids today should ponder these things more often in school.  I'm sure most kids today would say the cannon ball would come out the other end...


I think it would, it would keep oscillating back and forth through the center, eventually coming to a stop, much like a pendulum.



That was my conclusion when I first thought about this about 10 years ago.

Gravity is a force of attraction between objects having mass.  If you somehow got to the center of the earth, the mass of the earth would be all around you, pulling you in all directions at once with a force somewhat less than gravity on the surface.