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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Ballistics beyond 2000 yds : do we need/trust them?
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<blockquote data-quote="Gustavo" data-source="post: 138765" data-attributes="member: 6"><p>Here follows an extract that I took from Lutz Moller site</p><p></p><p>"As to why I post G1 BCs over giving the actual drag data. The general customer that we sell to has no capacity to interpret actual drag data. That fact is most experienced ballisticians intrepret drag data incorrectly. We give the general customer a tool that can be used with the popularly available computer programs. When used this way it is within the range of errors that the computer programs introduce. Most of them do not accurately adjust for air pressure ( they ask for elevation or altitude), they do not accurate adjust for temperature, they do not accurately adjust for ammo temperature, they do not have the user accurately input true muzzle velocity, and many others. If the program does not do these things it is meaningless to give true drag data.</p><p></p><p>The truth is it is a tool meant for a particular customer. This customer comprises 98% of the civilian market. </p><p></p><p>I do have the correct data that is very accurate, but trying to teach a customer how to use it in anything but a setup software program for the particular bullet and cartridge they are shooting is a mistake. We are marketing the latter to sophisticated long range military shooters now. We will be coming out with this software and hardware for the civilian market very soon. </p><p></p><p>Right now I am not interested in advancing the art of small arms ballistic trajectory calculating. I passed a number of years ago. I am interested in giving the shooter tools that will allow him to do it for himself. Do you think the average shooter can manipulate a 6 DOF formula for his 7mm? I don't. The computers and software will give them the tools they can use.</p><p></p><p>By the way, 6 DOF formulas would not be accurate enough for the tank gunners if their targets where at such a distance that the projectiles where approaching transonic. Trust me on this. With a MV of 4850 fps and the tremendous sectional density of the dart there is not much elevation required. Also, because the dart is fin stabilized the overspin yaw drag never significantly materializes.</p><p></p><p>Warren"</p><p></p><p>to me it's very enlightening and most interesting, specially on his points of view over the G1 model.</p></blockquote><p></p>
[QUOTE="Gustavo, post: 138765, member: 6"] Here follows an extract that I took from Lutz Moller site "As to why I post G1 BCs over giving the actual drag data. The general customer that we sell to has no capacity to interpret actual drag data. That fact is most experienced ballisticians intrepret drag data incorrectly. We give the general customer a tool that can be used with the popularly available computer programs. When used this way it is within the range of errors that the computer programs introduce. Most of them do not accurately adjust for air pressure ( they ask for elevation or altitude), they do not accurate adjust for temperature, they do not accurately adjust for ammo temperature, they do not have the user accurately input true muzzle velocity, and many others. If the program does not do these things it is meaningless to give true drag data. The truth is it is a tool meant for a particular customer. This customer comprises 98% of the civilian market. I do have the correct data that is very accurate, but trying to teach a customer how to use it in anything but a setup software program for the particular bullet and cartridge they are shooting is a mistake. We are marketing the latter to sophisticated long range military shooters now. We will be coming out with this software and hardware for the civilian market very soon. Right now I am not interested in advancing the art of small arms ballistic trajectory calculating. I passed a number of years ago. I am interested in giving the shooter tools that will allow him to do it for himself. Do you think the average shooter can manipulate a 6 DOF formula for his 7mm? I don't. The computers and software will give them the tools they can use. By the way, 6 DOF formulas would not be accurate enough for the tank gunners if their targets where at such a distance that the projectiles where approaching transonic. Trust me on this. With a MV of 4850 fps and the tremendous sectional density of the dart there is not much elevation required. Also, because the dart is fin stabilized the overspin yaw drag never significantly materializes. Warren" to me it's very enlightening and most interesting, specially on his points of view over the G1 model. [/QUOTE]
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Ballistics beyond 2000 yds : do we need/trust them?
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