Forums
New posts
Search forums
What's new
Articles
Latest reviews
Author list
Classifieds
Log in
Register
What's new
Search
Search
Search titles and first posts only
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Hornady 4DOF Ballistic Program
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="Bullseye" data-source="post: 1226949" data-attributes="member: 3351"><p>"Doppler radar measurement is the undisputed Cadillac of credibility for measuring bullet performance…" Litz (2009) "Applied Ballistics for Long Range Shooting" p. 25. </p><p>To state that a Doppler radar is no more accurate than an acoustic microphone system is incredulous. A Doppler radar runs at 10 to 35 GHZ, outputting up to 15 watts and is capable of tracking a projectile to extremely long ranges with resolution vastly exceeding any acoustic microphone system. Doppler radar is a primary tool used by facilities such as the Yuma Proving Grounds, the Naval Surface Warfare Center, the Air Force Weapons Lab at Eglin AFB and the Army Ballistics Research Lab at Aberdeen, MD for very good reason; they provide accurate data better than any other method. The ability of a Doppler radar has proven to be vastly superior to acoustic microphones. </p><p>Applied Ballistics further suggests that a Radar system is only as good as the people using it. That is an affront. Rest assured that Hornady ballisticians are more than capable of extrapolating Doppler radar information. Dave Emary was involved in ballistic research as far back as the 1980's and 90's with hyper velocity ballistics work for the Army, Navy and several major government labs that included Doppler radar use even back then. Hornady ballisticians have more than enough experience to be able to effectively use a Doppler radar. </p><p>A simple search of the Infinition and Weibel websites will reveal that radar gives both velocity and distance data as well as detailed drag data. The systems are also capable of measuring spin rate AND spin decay of a projectile. This is common practice.</p><p>Lastly, Hornady has been incorrectly quoted as claiming that they are the FIRST to calculate Aerodynamic Jump and Spin Drift. That is a misquote. The exact quote is: "Additionally, (4DOF) it is the first PUBLICLY available program that will CORRECTLY calculate the vertical shift a bullet experiences as it encounters a crosswind; referred to as aerodynamic jump." <a href="http://www.hornady.com/in-the-news/latest-news/new-drag-coefficient-based-ballistic-calculator" target="_blank">Hornady® Announces New Drag Coefficient Based Ballistic Calculator - Hornady Manufacturing, Inc</a> It is implied that "publicly available" insinuates use by civilians in the shooting sports industry. Hornady was careful in choosing the verbiage regarding the 4DOF calculator press release and marketing. </p><p>Hornady and other beta testers have evaluated the 4DOF calculator head to head with other commercially available calculators out to 2,000 yards. All users reported data consistent with Hornady claims regarding the accuracy of the 4DOF calculator.</p><p>Don't shoot the messenger because you don't like the message. Hornady has a calculator, Advanced Ballistics has a calculator; we'll let the shooters decide which calculator provides the best results.</p></blockquote><p></p>
[QUOTE="Bullseye, post: 1226949, member: 3351"] “Doppler radar measurement is the undisputed Cadillac of credibility for measuring bullet performance…” Litz (2009) “Applied Ballistics for Long Range Shooting” p. 25. To state that a Doppler radar is no more accurate than an acoustic microphone system is incredulous. A Doppler radar runs at 10 to 35 GHZ, outputting up to 15 watts and is capable of tracking a projectile to extremely long ranges with resolution vastly exceeding any acoustic microphone system. Doppler radar is a primary tool used by facilities such as the Yuma Proving Grounds, the Naval Surface Warfare Center, the Air Force Weapons Lab at Eglin AFB and the Army Ballistics Research Lab at Aberdeen, MD for very good reason; they provide accurate data better than any other method. The ability of a Doppler radar has proven to be vastly superior to acoustic microphones. Applied Ballistics further suggests that a Radar system is only as good as the people using it. That is an affront. Rest assured that Hornady ballisticians are more than capable of extrapolating Doppler radar information. Dave Emary was involved in ballistic research as far back as the 1980’s and 90’s with hyper velocity ballistics work for the Army, Navy and several major government labs that included Doppler radar use even back then. Hornady ballisticians have more than enough experience to be able to effectively use a Doppler radar. A simple search of the Infinition and Weibel websites will reveal that radar gives both velocity and distance data as well as detailed drag data. The systems are also capable of measuring spin rate AND spin decay of a projectile. This is common practice. Lastly, Hornady has been incorrectly quoted as claiming that they are the FIRST to calculate Aerodynamic Jump and Spin Drift. That is a misquote. The exact quote is: “Additionally, (4DOF) it is the first PUBLICLY available program that will CORRECTLY calculate the vertical shift a bullet experiences as it encounters a crosswind; referred to as aerodynamic jump.” [url=http://www.hornady.com/in-the-news/latest-news/new-drag-coefficient-based-ballistic-calculator]Hornady® Announces New Drag Coefficient Based Ballistic Calculator - Hornady Manufacturing, Inc[/url] It is implied that “publicly available” insinuates use by civilians in the shooting sports industry. Hornady was careful in choosing the verbiage regarding the 4DOF calculator press release and marketing. Hornady and other beta testers have evaluated the 4DOF calculator head to head with other commercially available calculators out to 2,000 yards. All users reported data consistent with Hornady claims regarding the accuracy of the 4DOF calculator. Don’t shoot the messenger because you don’t like the message. Hornady has a calculator, Advanced Ballistics has a calculator; we’ll let the shooters decide which calculator provides the best results. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Hornady 4DOF Ballistic Program
Top