9MM Hornady XTP +P Ballistic Gel Test Various Barrel Lengths

Published on March 22, 2026
Duration: 15:52

This video conducts a ballistic gel test of Hornady American Gunner 9mm XTP +P 124-grain ammunition fired from firearms with varying barrel lengths (3.3", 4.5", 7.5", and 10.5"). The test aims to observe the impact of barrel length on velocity, bullet expansion, and penetration depth in 10% ballistic gelatin. Results show significant expansion and penetration across all barrel lengths, with some surprising outcomes regarding wound cavity size and penetration depth between shorter and longer barrels.

Quick Summary

This ballistic gel test evaluated Hornady American Gunner 9mm XTP +P 124-grain ammunition fired from firearms with barrel lengths of 3.3", 4.5", 7.5", and 10.5". Results showed significant bullet expansion and penetration across all lengths, with shorter barrels producing surprisingly large wound cavities and comparable penetration to longer barrels in some instances.

Frequently Asked Questions

What ammunition was tested in the ballistic gel test?

The video tested Hornady American Gunner 9mm XTP +P 124-grain ammunition. This is a popular choice known for its expansion capabilities, and the +P rating indicates higher pressure for increased velocity.

How did different barrel lengths affect the 9mm Hornady XTP +P ammunition's performance?

The test used barrel lengths of 3.3", 4.5", 7.5", and 10.5". While longer barrels generally achieved slightly more penetration, the shorter barrels produced surprisingly large wound cavities and significant expansion, sometimes outperforming longer barrels in initial damage.

What were the key findings regarding bullet expansion and penetration?

The Hornady XTP +P 124-grain bullets showed substantial expansion and penetration across all barrel lengths, with depths ranging from about 12 to 15.5 inches in 10% ballistic gelatin. The expansion was noted as being more 'mangled' than expected by the presenter.

Were there any surprising results from the ballistic gel test?

Yes, the 3.3-inch barrel pistol produced a very large wound cavity and significant penetration, which was unexpected and comparable to, or even exceeding, the results from the 4.5-inch barrel Glock in the initial shots. A second shot from the 3.3-inch barrel showed a different expansion pattern, penetrating further.

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