This video tests Sinterfire Special Duty self-defense ammunition in 10mm Auto and .40 S&W calibers using ballistics gel. The test focuses on projectile fragmentation, penetration, and velocity differences between the two calibers with identical 125-grain projectiles. While both calibers demonstrated significant fragmentation and energy dump, the instructor expresses reservations about the lightweight nature of the projectiles for self-defense applications, particularly for the 10mm.
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