Posted on 08/05/2014 7:08:14 PM PDT by kjam22
Here's a guy who pops a balloon from 1000 yards with a 9mm. Fact or fiction?
There was a Browning High Power with sights adjustable to 500 yards. 1000 yards would be one hell of a lucky shot. IMHO, gravity alone would be all that could pop the balloon.
Bullet details. 147 grain Hornetty 9 mm?
Details
Item Number 35580
Weight 2.19 lbs
Muzzle Velocity Range (fps) 750-1200
Ballistic Coefficient (G1) 0.212
Sectional Density 0.167
Quantity 100/BX
Price:
Using the Hornety Ballistics calculator.
Your Input Variables
Ballistic Coefficient 0.212 Velocity (ft/s) 1000 Weight (grains) 147
Maximum Range (yds) 1000 Interval (yds) 100 Drag Function G1
Sight Height (inches) 1.5 Shooting Angle (degrees) 0 Zero Range (yds) 1000
Wind Speed (mph) 0 Wind Angle (degrees) 90 Altitude (ft) 0
Pressure (hg) 29.53 Temperature (F) 59 Humidity (%) 0.78
Ballistics Results - 35580 2.19 lbs MVelocity Range (fps) 750-1200 Ballistic Coefficient (G1) 0.212 S 0.167
RANGE (YARDS) VELOCITY (FPS) ENERGY (FT.-LB.) TRAJECTORY (IN) COME UP IN MOA COME UP IN MILS WIND DRIFT (IN) WIND DRIFT IN MOA WIND DRIFT IN MILS
Muzzle 1000 326 -1.5 0 0 0 0 0
100 916 274 276 -263 -76.5 0 0 0
200 850 236 512.3 -244 -71 0 0 0
300 795 206 700.6 -222.6 -64.7 0 0 0
400 746 182 833.9 -198.8 -57.8 0 0 0
500 702 161 905 -172.7 -50.2 0 0 0
600 660 142 905.8 -144.1 -41.9 0 0 0
700 622 126 827 -112.8 -32.8 0 0 0
800 586 112 658.1 -78.5 -22.8 0 0 0
900 552 100 387.1 -41.1 -11.9 0 0 0
1000 520 88 1 -0.1 0 0 0 0
So if it started at 1000fps, it would be down to 520fps by their calculation at 1000 yards.
To get there in 3 seconds, he has to average 1,000 fps. So he has to be going considerably faster at the start.
Guess 2,000 fps.
Your Input Variables
Ballistic Coefficient 0.212 Velocity (ft/s) 2000 Weight (grains) 147
Maximum Range (yds) 1000 Interval (yds) 100 Drag Function G1
Sight Height (inches) 1.5 Shooting Angle (degrees) 0 Zero Range (yds) 100
Wind Speed (mph) 0 Wind Angle (degrees) 90 Altitude (ft) 0
Pressure (hg) 29.53 Temperature (F) 59 Humidity (%) 0.78
Ballistics Results
RANGE (YARDS) VELOCITY (FPS) ENERGY (FT.-LB.) TRAJECTORY (IN) COME UP IN MOA COME UP IN MILS WIND DRIFT (IN) WIND DRIFT IN MOA WIND DRIFT IN MILS
Muzzle 2000 1306 -1.5 0 0 0 0 0
100 1660 900 0 0 0 0 0 0
200 1372 614 -11.3 5.4 1.6 0 0 0
300 1154 435 -41.2 13.1 3.8 0 0 0
400 1018 338 -97.1 23.2 6.7 0 0 0
500 930 283 -186.6 35.6 10.4 0 0 0
600 864 244 -316.4 50.3 14.6 0 0 0
700 809 214 -492.5 67.2 19.5 0 0 0
800 761 189 -722.5 86.2 25.1 0 0 0
900 717 168 -1012.7 107.4 31.2 0 0 0
1000 677 150 -1371.1 130.8 38.1 0 0 0
I have heard that women are generally better shots than men anyway. No ego invested in their shooting, so they listen to instruction, etc.
In any case, if you make gem like that angry, you’ll deserve it!
So you didn’t mean drop.
Really, his assertion is not so improbable when you consider that he had all the time in the world to sight in, and all he need do is get close and the balloon is history.
Not a mechanical engineer or a physicist, but your statement would only be true in controlled conditions.
Depending on the round, for example, they can tend to gain some altitude as they fly, and as the velocity slows they drop. The air has a lot of effect.
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Actually the air has little or no effect except to slow down the round or blow it off target. Because barrels are riffled the bullet spins. Any aerodynamic advantage from the shape of the round will be averaged out to zero. There are situations where the bullet could be tilted and “ride” the air up but that would be very rare indeed, or, come from elevating the barrel in the first place. I am only talking about a level barrel.
The purpose of aiming high on a distant target is not overcome the air resistance but it is to overcome gravity.
I realize this all sounds counter-intuitive but it is true.
Not going to argue gravity...It’s a constant.
But a bullet that can swerve off target as you correctly stated, can also swerve up or down.
It can also tumble. It’s been a while for me but if you look at the ballistics of some rounds, mostly in the rifle category. You will see a round that leaves the barrel on a trajectory that sometimes rises before it falls. Depending on the rifle and the bullet characteristics in flight.
It just is what it is.
Anytime you use the “dropped” mass association to a fired bullet trajectory, you have to do it in a vacuum so you take the medium that the object travels through out of the equation.
It’s a rather anal point, but it’s valid and that is all I was saying.. In the end, with gravity, everything falls at the same rate, but the air or whatever medium you choose, has a input on that rate and on the velocity.
A good analogy is a BB gun. Not all BB’s are round enough to be consistent. Some fly differently...up/down and sideways.
I see that everyday when I am harassing my resident squirrels who enjoy the game of “empty the bird feeder”.
It’s a custom Smith and Wesson revolver made for Jerry.
Looke ‘ere mates
https://www.youtube.com/results?search_query=mythbusters+bullet+dropped+vs+bullet+fired
Regards
alfa6 ;-}
To quote the NRA show on the Outdoor Channel, that’s an “Impossible Shot.”
That’s what Jerry does everyday !!
Even though they “deemed” the test a roaring success.
There was still a unexplained 39ms difference with a three foot drop and a .45 jacketed round.
Had this been done in a vacuum (not likely to be done that way....ever) I believe the times would have been almost if not exactly the same. So yes the gravity/mass argument is valid, but the gun/bullet/ and the air it travels through are potential variables.
Which is my point.
How about this classic physics experiment.
Shooting a falling monkey. The monkey begins to fall the moment the gun is fired.
https://m.youtube.com/watch?v=cxvsHNRXLjw
Which is low, because he said he used 70-75 yards!
I believe he did it, but if it was on just the second shot as shown, damn!!!!!!!!!!!!!!!!!!!!!!!!!!
A lot of skill, a lot of rounds and some luck.
I think part of the difference could be related to lag in the pistol firing and/or the “lock” mechanism of the drop rig.
And as they point out that differnce is less than the blink of an eye.
I was interested in the the travel distance as the round when held exactly level at 36” as well.
Regards
alfa6 ;>}
yeah....45 ball is pretty good out to 50 yards.
But that’s about it....IMO
However it will knock the target down...which is why I like it.
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