MTMilitiaman
Member
I have a question regarding the accuracy of the BC published by most manufactures for their bullets.
It is my understanding that the original drag model for calculating coefficient of form was intended to calculate the trajectory or semi-spitzer flat based artillery shells. It is also my understanding that other drag models exist to more accurately calculate the trajectory of more modern, streamlined match bullets. However, as far as I know, these drag models are not the industry standard used by manufactures.
Is there an industry standard, or are all of these guys using different methods to arrive at these numbers?
It is also my understanding that BC is affected by velocity and air density.
So how accurate are the BC numbers published by these manufactures? I realize they are probably close enough to get you on target at most hunting distances, but most hunting distances are close enough that BC doesn't matter anyways.
Do companies like Sierra and Berger use appropriate drag models when estimating the BC of their long range match bullets? If not, how accurate and applicable are these numbers, and how much difference does it make once we start talking some range, say beyond 500 yards?
In your experience, if you plug the factory estimated BC and appropriate environmental data into an external ballistics calculator, is the presented data usually accurate enough to be functional? If not, do you mess around with drag models? If so, why do other drag models even exist?
It is my understanding that the original drag model for calculating coefficient of form was intended to calculate the trajectory or semi-spitzer flat based artillery shells. It is also my understanding that other drag models exist to more accurately calculate the trajectory of more modern, streamlined match bullets. However, as far as I know, these drag models are not the industry standard used by manufactures.
Is there an industry standard, or are all of these guys using different methods to arrive at these numbers?
It is also my understanding that BC is affected by velocity and air density.
So how accurate are the BC numbers published by these manufactures? I realize they are probably close enough to get you on target at most hunting distances, but most hunting distances are close enough that BC doesn't matter anyways.
Do companies like Sierra and Berger use appropriate drag models when estimating the BC of their long range match bullets? If not, how accurate and applicable are these numbers, and how much difference does it make once we start talking some range, say beyond 500 yards?
In your experience, if you plug the factory estimated BC and appropriate environmental data into an external ballistics calculator, is the presented data usually accurate enough to be functional? If not, do you mess around with drag models? If so, why do other drag models even exist?
