Hornady 40040 XTP Hunting 10mm Auto .400 180 gr Hollow Point (HP)

The Hornady 40040 XTP Hunting 10mm Auto bullet is a 180-grain hollow point designed for reloaders building ammunition for hunting and self-defense. The XTP (eXtreme Terminal Performance) line has earned its reputation among handgun hunters and competitive shooters by delivering reliable expansion and deep penetration across a wide velocity range — critical for 10mm loads where muzzle velocity can vary significantly depending on powder charge and firearm.

What sets the XTP apart in the reloading component market is its engineered expansion profile. The bullet uses precise serrations to divide the jacket into symmetrical sections, weakening it in a controlled way so expansion begins even at lower velocities. This matters when you're handloading: you get consistent performance whether you're working up a mild target load or a full-power hunting round. The gilding metal jacket protects the bullet nose and ensures the hollow cavity functions properly on impact, while the swaged core maintains uniformity for balanced expansion and flight stability. Varying jacket thickness along the bullet's length — a design advantage over plated alternatives with uniform jackets — gives you the terminal performance serious 10mm hunters expect.

For reloaders assembling 10mm hunting or defensive ammunition, these .400 180-grain bullets are built to feed reliably in semi-automatics and offer the accuracy that keeps them in favor with both target shooters and hunters. The cannelure (on revolver variants where applicable) supports consistent crimping, applied before final forming to avoid distortion.

Key Features

• Controlled expansion through strategically placed serrations for reliable performance across velocity ranges
• Gilding metal jacket prevents exposed lead and ensures proper hollow cavity function
• Swaged core for uniform density, balanced expansion, and in-flight stability
• Varying jacket thickness for superior expansion control versus plated bullets
• Designed for reliable feeding in semi-automatic handguns

Specifications

Frequently Asked Questions

What's the difference between XTP bullets and plated bullets for handloading?

XTP bullets use a drawn gilding metal jacket with varying thickness along the bullet's length, which gives you better control over expansion. Plated bullets have uniform jacket thickness from nose to base, which doesn't provide the same expansion profile. For hunting and defensive loads, the XTP design delivers more predictable terminal performance.

Can I use these in a semi-automatic 10mm pistol?

Yes. The XTP is specifically designed for reliable feeding in semi-automatics. The gilding metal jacket and hollow cavity design ensure the bullet feeds smoothly while expanding reliably on impact.

Will the XTP expand at lower velocities?

Yes. The serrated design and controlled jacket thickness initiate expansion even at lower velocities, which is important when handloading since 10mm loads can range from modest to full-power depending on your powder charge.

What's included in Hornady part number 40040?

This is a component bullet only — you receive the projectiles for handloading. Powder, primers, and cases are sold separately.