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Old 03-24-2010, 03:34 PM   #11
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Try this one.

http://www.winchester.com/learning-c...alculator.aspx
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Old 03-24-2010, 04:10 PM   #12
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would you mind explaining why 2 bullets the same weight, but different BC.s at the same velocity don't drop the same? keep it simple I'm a lil slow.
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Originally Posted by 98Redline View Post
Take a look at this page on the Hornady website (External Ballistics)

It ihas the exact scenario you describe discussed at the end of the first section (Trajectory).
Hook, Line, and sinker.
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Old 03-24-2010, 04:46 PM   #13
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wait, weren't you just argueing that bullets all slow down and drop the same? what happened there?
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Old 03-24-2010, 05:04 PM   #14
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In REAL LIFE conditions, the amount the bullet will drop at extended ranges will depend on MV, BC, atmospheric pressure, temp, and numerous other factors. For ranges anyone asking these questions should be considering, you at least need to qualify what bullet you are shooting (to define BC) and the muzzle velocity at which it will be launched. As distance increases, any errors due to approximating either one will increase rapidly.
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Old 03-31-2010, 05:16 PM   #15
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oh i'm going to mess things up. Any thing of similar shape will drop the same distance in a given amount of time, a feather and a rock don't apply as the feather has a wide enough surface (so would say a piece of paper) to trap air under so it floats down, if you sqeezed the feather into a ball then it would drop the same distance in a given amount of time. If you dropped a rock straight down, and fired a 300 win mag with the barrel level over a level area both would hit the ground at the same time. The test I did so many years ago when they taught us this silly idea in school was to drop a 1 lb and a 10 lb rock off a 30' silo. It still does't seem right but it is
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Old 03-31-2010, 06:49 PM   #16
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oh i'm going to mess things up. Any thing of similar shape will drop the same distance in a given amount of time, a feather and a rock don't apply as the feather has a wide enough surface (so would say a piece of paper) to trap air under so it floats down, if you squeezed the feather into a ball then it would drop the same distance in a given amount of time. If you dropped a rock straight down, and fired a 300 win mag with the barrel level over a level area both would hit the ground at the same time. The test I did so many years ago when they taught us this silly idea in school was to drop a 1 lb and a 10 lb rock off a 30' silo. It still does't seem right but it is
This only applies to bullets fired perfectly level to the ground.

What you don't mention, or maybe realize, is that if you were to take a bullet with a low BC (round nose) and a bullet with a high BC (Berger VLD) and fire them perfectly level with the ground at exactly the same velocity at exactly the same time the bullet with the higher BC will travel farther than the bullet with the lower BC because it is more aerodynamic and it retained its initial velocity over distance longer than the round nosed bullet did.
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