First Look: Hornady ELD-X Bullet
November 13, 2015
Bullet-makers agonize over every little curve, everyÂ nano-measurement of theÂ ogive,Â cannelureÂ andÂ me plat. other aspects that most hunters don't even know exist.
But what about that big old plastic tip? Had anyone paid that much attention to that?Â According to engineers atÂ HornadyÂ Ammunition, no.
"Their tips are melting," said DaveÂ EmaryÂ ofÂ Hornady. "Our tips are melting, too."
EmaryÂ said the polymer tips of bullets that travel over long distances at high speeds are literally deforming in flight and literally, melting on their way. As youÂ couldÂ imagine, that disrupts the slipperiness of the bullet, which is key to accurate flight.
"That increased theÂ meplatÂ diameter, the point of the bullet, and theÂ ballistic coefficientÂ (BC)Â dropped while the aerodynamic drag increased," said Jayden Quinlan, ballistics engineer.
Hornady'sÂ answer to this problem is a new ELD-X bullet that uses a polymer that resists melting. They're calling it their Heat Shield Tip, and they're topping a newly designed long-distance bullet with it. The Hornady ELD-X, short for Extremely Low DragÂ Expanding, also has several other features that make it an excellent choice for long-and close-distanceÂ shooting.
FromÂ the muzzleÂ to about 400 yards, the Hornady ELD-X bullet is designed to continually expand through the game animal, remain intact and resist tumbling. Out past 400, the Heat Shield Tip drivesÂ backward into the redesigned nose cavity toÂ startÂ expansion even at lower velocities.
ELD-X bullets will be loaded into a new cartridge called Precision Hunter, and available in early 2016. The bullets will only be used inÂ 6.5mm toÂ .30-caliberÂ range,Â that is,Â those that reach high speeds quickly and retain them.
According to the company, there is no plan to replace all of their polymer-tipped bullets with the Heat Shield Tip, although that may happen in the future. They said lighter bullets that have high velocities, like their V-MAXÂ varmint bullets,Â lose those velocities quickly. The tips don't have time to melt and deform aerodynamics, according toÂ Emary, who is chief ballistician at the NebraskaÂ company.
A few years ago, engineersÂ started using ultra-precise DopplerÂ RadarÂ to measure bullet flight characteristics from the muzzle until it hitÂ a distance target. At first, they did not get the numbers they were seeking. The BC or ballistic coefficient was about 15 percent lower than they expected.
When they took a closer look at the Doppler data, they concluded that the bullet must actually be changing shape a different points during the flight. After floating and dismissing several theories, they realized that the plastic tip would be melting if the bullet reached high velocities for a period of time, specifically 800 degrees for more than a second or two.
"And that's when the light bulb clicked on," said engineer JoeÂ Theilen.
They tried a different, heat resistance polymer, and got dramatically better performance with the same bullet, propellant, caliber and gun.
The simple change — '¯from one polymer to another — '¯is the reason long-range shooters will be able to likely improve their groups.
HornadyÂ will be offering eight long-range calibers from 6.5mm Creedmoor to .300 Rem UltraÂ MagÂ to start. They are expected to cost about $40 per box of ammo in the .30-caliber range.
At the range, engineers shot 4-inch groups at 930 yards. At 200 yards, count on .5 MOA, if your gun is capable of it.
I was impressed at the long-range accuracy of these new bullets. I shot a .300 Win Mag at steel targets from 100 out to 1,100 yards and was astounded at the accuracy.
Gels tests showed phenomenal expanding characteristics at short and long ranges. The bullet stubbed down to the core and retained the mushroom shape at even long distances where velocities and energy were dissipating. It producedÂ violent,Â gapping temporary wound cavities and penetrated to about 24 inches before stopping.
Another demonstration of the effectiveness of the new Heat Shield Tip was revealed when Hornady measured the Ballistic Coefficient of bullets with the new tip as compared to the old tip. The company's 6.5 140-gran A-MAX traditionally has a published BC of.585. But when Hornady checked it with Doppler radar, it actually had a BC of .545 at long distances said Emary. That's a huge jump in aerodynamics of what was already a very accurate bullet.