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-   Black Powder (https://www.huntingnet.com/forum/black-powder-23/)
-   -   How to use a Ballistics Program (https://www.huntingnet.com/forum/black-powder/250918-how-use-ballistics-program.html)

oldsmellhound 07-01-2008 07:28 AM
RE: How to use a Ballistics Program
 
Carrying a big smokepole WILL get you far, that is true. I was joking about the math (though I did do pretty bad in college calculus) - my brain just got overwhelmed with the wealth of mathematical information in your post;)

HuntAway 07-01-2008 06:19 PM
RE: How to use a Ballistics Program
 
The most nervous I have been when shooting a ML was when I sailed 5 bullets through my chrony @ 100 yds to use as confirmation against these calculators. :(Thinking to myself "Please don't have a flier."[:@]

The chrony survived and as it turned out the "numbers" were pretty close +/- 20 fps.:D

Semisane 07-01-2008 06:26 PM
RE: How to use a Ballistics Program
 
The most nervous I have been when shooting a ML was when I sailed 5 bullets through my chrony @ 100 yds
:DI haven't worked up the nerve to do it yet.

gleason.chapman 07-01-2008 06:47 PM
RE: How to use a Ballistics Program
 
ORIGINAL: HuntAway

The most nervous I have been when shooting a ML was when I sailed 5 bullets through my chrony @ 100 yds to use as confirmation against these calculators. :(Thinking to myself "Please don't have a flier."[:@]

The chrony survived and as it turned out the "numbers" were pretty close +/- 20 fps.:D
That is good to know, with good chrony and accurate BC, should be pretty close.
Chap

gleason.chapman 07-01-2008 06:50 PM
RE: How to use a Ballistics Program
 
ORIGINAL: oldsmellhound

Carrying a big smokepole WILL get you far, that is true. I was joking about the math (though I did do pretty bad in college calculus) - my brain just got overwhelmed with the wealth of mathematical information in your post;)
I have an MS in math/statistics, so it is kinda the way I think. Sorry, was just trying to show how to use the ballistics program to arrive at some conclusions.
Best Wishes, Chap

gleason.chapman 07-01-2008 06:57 PM
RE: How to use a Ballistics Program
 
ORIGINAL: Semisane

The most nervous I have been when shooting a ML was when I sailed 5 bullets through my chrony @ 100 yds
:DI haven't worked up the nerve to do it yet.
Why do it at 100 yards? If you can do it at 10 feet and have +-20 fps? The medium (air) is pretty uniform from 0 to 100 yards. I can understand your nervious, you would want a pretty tight group to go shootin' thru it at 100!

Chap

sabotloader 07-01-2008 07:22 PM
RE: How to use a Ballistics Program
 
gleason.chapman

Why do it at 100 yards?
Because if you shoot the bullet through your chrono at a 100 and do the same at 10 feet - you can calculatethe true BC of the bullet you are shooting at the velocity you are shooting it. BC is a function of velocity...

gleason.chapman 07-02-2008 07:21 AM
RE: How to use a Ballistics Program
 
ORIGINAL: sabotloader

gleason.chapman

Why do it at 100 yards?
Because if you shoot the bullet through your chrono at a 100 and do the same at 10 feet - you can calculatethe true BC of the bullet you are shooting at the velocity you are shooting it. BC is a function of velocity...
SL,
Do you know the formula for that and step by step procedures on how to calculate the BC? I have seen a lot of bullet makers inflate their BC, which would not be good when your trying to get accurate trajectory. PR Dead Centers come to mind on not being accurate BC. Anyway would like to know the formula and procedures on how to calculate. Good book on it? Thanks Chap

dmurphy317 07-02-2008 11:18 AM
RE: How to use a Ballistics Program
 
I've found the Point Blankprogram to be quite accurate and it includes a function to calculate the BC of a bullet using weight and velocities at muzzle and 100 yards. It is located at www.HuntingNut.comand it's free. It is easy to download and can be put on a thumb drive and carried around with you if you work with multiple computers. I use it for doing comparisons similar to what Chap is doing. It also comes in handy to bust some of the myths that seem to presist about certain ultra long range muzzleloaders out there not to mention the CF comparisons.

gleason.chapman 07-02-2008 05:25 PM
RE: How to use a Ballistics Program
 
ORIGINAL: dmurphy317

I've found the Point Blankprogram to be quite accurate and it includes a function to calculate the BC of a bullet using weight and velocities at muzzle and 100 yards. It is located at www.HuntingNut.comand it's free. It is easy to download and can be put on a thumb drive and carried around with you if you work with multiple computers. I use it for doing comparisons similar to what Chap is doing. It also comes in handy to bust some of the myths that seem to presist about certain ultra long range muzzleloaders out there not to mention the CF comparisons.
David, Good post,I have the Point Blank program, but have not used it because there are ones on the web, that I can show others how to use easily. Do they have good help and intrepretation of results? or do they assume "everyone knows what they are doing with regard to ballistics"?
Chap


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