What does GMX mean on a Hornady bullet?

The new Hornady bullet is called the “Gilding Metal eXpanding” (GMX), which gives a clue to what monolithic metal is used. Gilding metal is the same material most jacketed bullets use to wrap the lead core, an alloy composed of 95 percent copper and 5 percent zinc.

What are Hornady GMX bullets good for?

Proven GMX® Bullets These monolithic copper alloy bullets deliver uniform, controlled expansion and 95%+ weight retention for deep penetration and superior terminal performance. They are also California compatible and appropriate for use in areas that require non-traditional bullets.

What type of bullet is a Hornady GMX?

Product Information

Are Hornady GMX lead free?

Home reloaders will love the downrange performance of the Hornady® GMX® Lead-Free Bullets. Constructed of Gilding Metal, these bullets outperform copper bullets due to reduced pressures and minimzed fouling. Plus, the streamlined design of these Hornady bullets offers superior, consistent accuracy and performance.

What is an SST bullet?

Hornady® SST® Bullets (Super Shock Tip) are premium hunting bullets designed to shoot flat and hit hard. The bullet’s polymer tip increases the ballistic coefficient for flatter trajectory, and the tip pushes back into the lead core upon impact to initiate rapid expansion, even at long rage.

Are Hornady GMX bullets lead-free?

What is SST bullet?

What does SST stand for in Hornady bullets?

Super Shock Tip
The Hornady® SST® (Super Shock Tip) is designed to deliver tremendous shock on impact while expanding quickly and reliably, particularly at higher velocities.

What is the difference between GMX and factory Hornady bullets?

“The new Hornady GMX (Gilding Metal eXpanding) bullets and factory ammunition offer the hunter who favors an expanding monolithic bullet a better choice. GMX bullets are constructed of the same gilding metal used to make ultra-consistent Hornady bullet jackets.

Should I use GMX bullets for expansion?

So, if you use GMX, make sure you’re getting enough velocity to get the kind of expansion we all want, like Hornady shows us below at 2700 FPS or higher for .30 caliber, and that’s going to exclude a lot of calibers at a lot of ranges with GMX bullets.

What is the impact velocity of a Hornady TTSX?

“Hornady .30/150 gr. GMX bullet expansion at various impact velocities. Left to right: cut-away, unfired, 3400 fps, 2700 fps, 2000 fps. Illustration courtesy of Hornady Manufacturing.” Here is a 6mm TTSX that I recovered that had an impact velocity of ~2100 fps.

What’s the difference between TSX and GMX bullet expansion?

Even so, Barnes claims that TSX bullet expansion initiates at impact velocities as low as 1600 fps, while Hornady admits that GMX bullets require at least 2000 fps at impact, presumably because gilding metal is harder than pure copper.