November 3rd, 2017

Hornady Releases Free Mobile Ballistic App with 4DOF™

Hornady Ballistic Ballistics App Mobile 4DOF degrees of freedom aerodynamic jump Android Apple iOS

Hornady Ballistic Ballistics App Mobile 4DOF degrees of freedom aerodynamic jump Android Apple iOSHornady has released a new FREE Ballistic Calculator App for iOS (Apple) and Android OS. This new Mobile Ballistic App includes Hornady’s advanced 4DOF™ calculator as well as a standard BC (ballistic coefficient) calculator. The Hornady Ballistic Calculator App is Bluetooth-enabled so it can communicate with select wind meters.

The Hornady Ballistic App is FREE but you do need to supply an email address. We found the App downloaded quickly and installed easily. While the Mobile Ballistic App is new, Hornady has offered a web-based online 4DOF Ballistic App since August 2016.


GET Apple iOS Version HERE | GET Android OS Version HERE

Hornady’s new 4DOF™ (4 Degrees of Freedom) Ballistic Calculator has become a popular resource for those seeking more accurate trajectories, especially at extreme ranges. The Hornady 4DOF calculator provides trajectory solutions based on projectile Drag Coefficient (not ballistic coefficient) along with the exact physical modeling of the projectile and its mass and aerodynamic properties. Additionally, 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. Hornady claims that: “The use of drag coefficients, correct projectile dynamics, aerodynamic jump, and spin drift enable the Hornady 4DOF ballistic calculator to be the most accurate commercial trajectory program available[.]”

“Current ballistic calculators provide three degrees of freedom in their approach; windage, elevation and range, but treat the projectile as an inanimate lump flying through the air,” said Dave Emary, Hornady Chief Ballistician. “This program incorporates the projectile’s movement in the standard three degrees but also adds its movement about its center of gravity and subsequent angle relative to its line of flight, which is the fourth degree of freedom.”

Hornady Ballistic Ballistics App Mobile 4DOF degrees of freedome aerodynamic jump Android Apple iOS

Bullet Drag Profiles Created with Doppler Radar
Using Doppler radar, Hornady engineers have calculated exact drag versus velocity curves for each bullet in the 4DOF™ calculator library. Hornady engineers say this makes the 4DOF™ calculator “more accurate for long range hits than … BC-based systems or custom drag curves based on limited data collection points.”

The 4DOF ballistic calculator is used with pre-populated bullet files that include long range match and hunting style bullets from Hornady including ELD-X and ELD Match bullets. In addition, popular long range projectiles from Sierra, Berger, and other bullet-makers are included. To view the web-based version of 4DOF and see the projectiles available, visit www.Hornady.com/4dof.

Standard Ballistics Calculator Functionality
The new Hornady Mobile App also features a standard BC-based calculator for use with bullets not listed in the 4DOF database. Users can enter their own G1 or G7 BC, or choose from the entire lineup of Hornady bullets and ammunition in easily-filtered, pre-populated lists.

Installation and User Feedback
We installed Hornady’s new Mobile Ballistic App on an Apple iPhone 5s and and older Samsung Galaxy. The App downloaded quickly and installed flawlessly on both platforms. We were able to register easily (once we added a Capital Letter to the password) and the App launched without a hitch. This Hornady App is FREE but it does require users to submit an email address. This enables Hornady to send marketing messages, but registered users may opt out.

NOTE: A couple iOS and Android users reported issues with registration. This might be a software bug (or, more likely, it was user error) but we thought we should report this:

From Apple App Store Reviews:
“Tried registration, failed on the App and it won’t take my site info.” — Heavy G 603

“App crashes right after the two accept buttons.” — Austin.M

From Google Play Reviews:
“Required registration works on website but not for this app…” — Ken S., 11/2/17

Permalink Bullets, Brass, Ammo, New Product 2 Comments »
November 3rd, 2017

Killer Deals on Leica Hunting Scopes — 50% OFF Sale

Leica ER5 Hunting scope riflescope sale discount 50% off

If you need a high-quality scope for your hunting rifle, here are some exceptional deals on premium European-designed optics from Leica, a world leader in optics technology. Right now at EuroOptic.com you can get top-quality Leica ER5 riflescopes for 50% off. For example the ER5 2-10x50mm scope with Plex reticle, normally $999.00 is now priced at just $499.00. CLICK HERE for ER5 Product Specs.

Leica ER5 Hunting scope riflescope sale discount 50% off

These Leica prices are so LOW and the scopes are selling so fast we wanted to let you guys know. Jason Baney helped get this site off the ground a decade ago (when we were 6mmBR.com). Now Jason works at EuroOptic.com. He called to let us know about this special sale on Leica hunting scopes.

Jason notes: “FYI, these are MADE-IN-USA and the turrets under the caps are appropriately marked and finger-adjustable to be able to dial up in the field. Also you can reset the zero on the turret by just lifting to disengage and then push it back down to lock in — very slick”. Learn More HERE.

Available models on sale are: ER5 2-10x50mm (4 reticles); ER5 3-15x56mm (4 reticles); ER5 4-20x50mm (2 reticles)

Leica ER5 Hunting scope riflescope sale discount 50% off

Leica ER5 Hunting scope riflescope sale discount 50% off

Permalink Hot Deals, Hunting/Varminting, Optics 1 Comment »
November 3rd, 2017

Learn How the Human Ear Works — And Protect Your Hearing

hearing protectionAll shooters, even rimfire enthusiasts, should always wear ear protection when at the range. A typical rifle gunshot is very loud — in the region of 140 to 170 decibels (the pain threshold is 130-140 db). Without ear protection, you can permanently damage your hearing during a single shooting session. We all know older shooters who are partially deaf, or who suffer from Tinnitus, because they didn’t use earplugs or muffs when they were younger.

How Humans Hear Sounds — Amazing Video Reveals All
The human sense of hearing involves multiple delicate internal membranes, bones, organs, and nerves. Shooters understand the importance of protecting their hearing, but they may not understand the bio-mechanics of human hearing. We hear sounds through Auditory Transduction. Sound waves vibrate the ear drum (tympanic membrane), but that is only the beginning. These vibrations are passed along via tiny rocker-arm-like bones to be “processed” in a spiral chamber, the cochlea. Vibrations moving through the cochlea are separated into frequencies and then sent as neural messages to the brain. It is an astonishingly complex process, one that truly seems miraculous when you examine the bio-engineering involved. In the Video below, the process of human Auditory Transduction is explained and illustrated with 3D animation. You really should watch this amazing video. By the end you will have a new-found appreciation for your ability to hear.

This remarkable VIDEO explains how humans hear sounds. We strongly recommend you take the time to watch and learn. The hearing you save may be your own!

Ear diagram courtesy Siemens Medical Solutions.

Permalink - Articles, Tech Tip 1 Comment »