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Author Topic: Bullet speed  (Read 1324 times)

Offline SkyRock

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Bullet speed
« Reply #15 on: July 30, 2007, 01:15:55 PM »
This thread is soo.......................... dreamy!:D
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Offline Toad

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Bullet speed
« Reply #16 on: July 30, 2007, 01:23:58 PM »
Just to give you an idea

Muzzle 2898

400 yds 2306

800 yds 1790

and that's with the HEIAP 665g; the heavier ball probably slows down faster.
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Offline rabbidrabbit

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Bullet speed
« Reply #17 on: July 30, 2007, 01:30:39 PM »
I believe the heavier ball would slow down slower... ie... carry better...
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Offline Castedo

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Bullet speed
« Reply #18 on: July 30, 2007, 01:40:41 PM »
Shape matter too.  I believe the 50 were faster, but I could be wrong.
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Offline Masherbrum

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Re: Re: Re: Bullet speed
« Reply #19 on: July 30, 2007, 02:15:58 PM »
Quote
Originally posted by TinmanX
He's Superman, at least that's what his underwear says.
Oh chit!   :rofl :rofl :rofl :rofl
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Offline Dream Child

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Bullet speed
« Reply #20 on: July 30, 2007, 03:09:29 PM »
Quote
Originally posted by Krusty
Are you sure? 2 seconds is a long time. Get a stopwatch and time it. I've taken many pot-shots at 800 yards and only had to wait about a second to see the results.

Also, that's just the exit-the-barrel speed. It slows down AFTER that point due to the density of the air its passing through.

EDIT: 800 yds is about 2400 feet. If the muzzel velocity is 2800-2900 (and I'm just quoting you here) it wouldn't be exactly one second it would be 0.85 seconds or so.


The one second takes into account the drop in bullet speed. Yes, 800 yards is 2400 feet. A .50 BMG is still doing over 2400 fps at 300 yards. The bullet slows down after exiting the barrell, the end result is that it's almost exactly 1 second at 800 yards for the real thing.
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Offline ClevMan

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Re: Re: Bullet speed
« Reply #21 on: July 30, 2007, 03:13:42 PM »
Quote
Originally posted by dedalos
How did you measure it?


Yardstick?
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Offline Slash27

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Re: Re: Re: Bullet speed
« Reply #22 on: July 30, 2007, 03:25:37 PM »
Quote
Originally posted by ClevMan
Yardstick?


pervert:mad:
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Offline Furious

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Bullet speed
« Reply #23 on: July 30, 2007, 03:42:29 PM »
Where's Tony?
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Offline kvuo75

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Bullet speed
« Reply #24 on: July 30, 2007, 03:46:10 PM »
Modern Ballistics Data Created: 07/30/07 13:44:16

Firearm: Default
Cartridge: .50 BMG
Conditions: Default
Range (yds):            50    100    200    400    600    800   1000   1200   1400   1500
----
Drop (inches)         0.56   2.27   9.27  38.80  91.60 171.21 281.92 428.93 618.59 731.80
Height (inches)       3.18   6.71  10.18   1.58 -30.27 -88.94-178.70-304.76-473.48-576.22
Height (moa)          6.07   6.40   4.86   0.38  -4.82 -10.62 -17.06 -24.25 -32.29 -36.68
Height (mils)         1.76   1.86   1.41   0.11  -1.40  -3.09  -4.96  -7.05  -9.39 -10.67
Windage (inches)      0.08   0.31   1.27   5.25  12.23  22.56  36.62  54.87  77.83  91.27
Windage (moa)         0.15   0.30   0.61   1.25   1.95   2.69   3.50   4.37   5.31   5.81
Windage (mils)        0.04   0.09   0.18   0.36   0.57   0.78   1.02   1.27   1.54   1.69
Time (S)             0.054  0.109  0.221  0.458  0.712  0.985  1.280  1.597  1.942  2.126
Velocity (ft/S)       2755   2710   2621   2448   2280   2119   1963   1814   1670   1600
Energy (ft-lbs)      12635  12226  11437   9975   8658   7475   6418   5478   4644   4265
PF                    2066   2032   1966   1836   1710   1589   1472   1360   1253   1200
Group (inches)        0.02   0.08   0.34   1.40   3.26   6.01   9.75  14.61  20.72  24.30
Group (moa)           0.04   0.08   0.16   0.33   0.52   0.72   0.93   1.16   1.41   1.55
Group (mils)          0.01   0.02   0.05   0.10   0.15   0.21   0.27   0.34   0.41   0.45
Groups <= desired    0.00%  0.00%  0.00%  0.00%  0.00%  0.00%  0.00%  0.00%  0.00%  0.00%
1 grp of <= desired    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0
-----
Constants:
Mid rng Ht (in)    10.3   Midrange (yds)     219.6  Zero (yds)         415.4  
Near zero (yds)    14.8   P.B. Size (in)     20.55  P.B. Range (yds)   494    
M.V. (ft/S)        2800   M.V. SDev (fps)    0.0    B.C.               1.050  
Mass (grains)      750    Sight Ht (in)      1.50   Indicated SA (moa) 10.00  
SA Offset (moa)    0.00   Barometer          29.53  Incline (deg)      0      
Wind (mph)         10     Wind error (mph)   2      Wind (deg.)        90    
Temp (F)           59     Alt. (feet)        0      Gravity            32.17  
Shots per group    5      Bullet acc. (moa)  0.00   Desired Grp (moa)  1.00  
Group Simulations  500    
----
Firearm name: Default
Firearm notes:
Cartridge name: .50 BMG
Cartridge notes: BC is for Hornady A-Max.  MV is for max load of H50BMG.
Conditions name: Default
Conditions notes:



courtesy of the free program http://www.modernballistics.com/
« Last Edit: July 30, 2007, 03:48:32 PM by kvuo75 »
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Offline sgt203

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Re: Re: Re: Bullet speed
« Reply #25 on: July 30, 2007, 04:11:46 PM »
Quote
Originally posted by TinmanX
He's Superman, at least that's what his underwear says.


:rofl :rofl :rofl

Now thats funny right there :aok

 :aok
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Offline Bronk

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Bullet speed
« Reply #26 on: July 30, 2007, 04:20:45 PM »
Quote
Originally posted by kvuo75
Modern Ballistics Data Created: 07/30/07 13:44:16

Firearm: Default
Cartridge: .50 BMG
Conditions: Default
Range (yds):            50    100    200    400    600    800   1000   1200   1400   1500
----
Drop (inches)         0.56   2.27   9.27  38.80  91.60 171.21 281.92 428.93 618.59 731.80
Height (inches)       3.18   6.71  10.18   1.58 -30.27 -88.94-178.70-304.76-473.48-576.22
Height (moa)          6.07   6.40   4.86   0.38  -4.82 -10.62 -17.06 -24.25 -32.29 -36.68
Height (mils)         1.76   1.86   1.41   0.11  -1.40  -3.09  -4.96  -7.05  -9.39 -10.67
Windage (inches)      0.08   0.31   1.27   5.25  12.23  22.56  36.62  54.87  77.83  91.27
Windage (moa)         0.15   0.30   0.61   1.25   1.95   2.69   3.50   4.37   5.31   5.81
Windage (mils)        0.04   0.09   0.18   0.36   0.57   0.78   1.02   1.27   1.54   1.69
Time (S)             0.054  0.109  0.221  0.458  0.712  0.985  1.280  1.597  1.942  2.126
Velocity (ft/S)       2755   2710   2621   2448   2280   2119   1963   1814   1670   1600
Energy (ft-lbs)      12635  12226  11437   9975   8658   7475   6418   5478   4644   4265
PF                    2066   2032   1966   1836   1710   1589   1472   1360   1253   1200
Group (inches)        0.02   0.08   0.34   1.40   3.26   6.01   9.75  14.61  20.72  24.30
Group (moa)           0.04   0.08   0.16   0.33   0.52   0.72   0.93   1.16   1.41   1.55
Group (mils)          0.01   0.02   0.05   0.10   0.15   0.21   0.27   0.34   0.41   0.45
Groups <= desired    0.00%  0.00%  0.00%  0.00%  0.00%  0.00%  0.00%  0.00%  0.00%  0.00%
1 grp of <= desired    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0
-----
Constants:
Mid rng Ht (in)    10.3   Midrange (yds)     219.6  Zero (yds)         415.4  
Near zero (yds)    14.8   P.B. Size (in)     20.55  P.B. Range (yds)   494    
M.V. (ft/S)        2800   M.V. SDev (fps)    0.0    B.C.               1.050  
Mass (grains)      750    Sight Ht (in)      1.50   Indicated SA (moa) 10.00  
SA Offset (moa)    0.00   Barometer          29.53  Incline (deg)      0      
Wind (mph)         10     Wind error (mph)   2      Wind (deg.)        90    
Temp (F)           59     Alt. (feet)        0      Gravity            32.17  
Shots per group    5      Bullet acc. (moa)  0.00   Desired Grp (moa)  1.00  
Group Simulations  500    
----
Firearm name: Default
Firearm notes:
Cartridge name: .50 BMG
Cartridge notes: BC is for Hornady A-Max.  MV is for max load of H50BMG.
Conditions name: Default
Conditions notes:



courtesy of the free program http://www.modernballistics.com/

Great, now what weapon is it fired from?
An AC HMG or say a closed bolt single shot sniper rifle?
What about wind hitting the muzzle at 300mph.
Also add in your target is traveling at over a football field a second.

Time of flight for an 800 yd target  moving at say 300 mph would be what?

:huh


Bronk
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Offline Rino

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Bullet speed
« Reply #27 on: July 30, 2007, 04:22:40 PM »
Quote
Originally posted by dedalos
Maybe he was using old bullets.  Like old people they also slow :D


      Was the bullet's left turn signal left on for the duration of the flight? :D
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Offline Lusche

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Re: Re: Re: Bullet speed
« Reply #28 on: July 30, 2007, 05:10:47 PM »
Quote
Originally posted by Dream Child
Go offline and use the .target command. Set a target at 800 yards. Use a M-16 or something else with .50 BMG rounds. A .50 BMG has about a 2800-2900 fps muzzle velocity depending on specific load. It should take almost exactly one second to get to 800 yards. It takes 2 seconds to do so.


I only have the real world data for German ammo, but a 13mm round (if someone wants to know the exact type of round: Pzgr.Patr L'Spur el o.Zerl) needs 1.967 seconds to travel to 800m (879yds), a 20mm MG 151 round (M-Geschoss) 2 seconds.

So you observation of about 2 seconds does not look like a bug to me. :)
« Last Edit: July 30, 2007, 05:12:56 PM by Lusche »
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Offline Dream Child

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Bullet speed
« Reply #29 on: July 30, 2007, 06:31:40 PM »
Quote
Originally posted by Bronk
Great, now what weapon is it fired from?
An AC HMG or say a closed bolt single shot sniper rifle?
What about wind hitting the muzzle at 300mph.
Also add in your target is traveling at over a football field a second.

Time of flight for an 800 yd target  moving at say 300 mph would be what?

:huh


Bronk


All of this is irrelevent. The initial scenario was a stationary target with a stationary firing platform. If those numbers aren't correct, then none of the other numbers will be correct either. His numbers showed 0.985 seconds at 800 yards, basically verifying my "almost exactly one second" statement at 800 yards. Unfortunatly, timing this offline is a bit tricky. It still looks slow to me. I'm having a more difficult time finding numbers for the tanks used in this game, as they could be timed easier at longer distances.
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