Underwood 10mm Auto 220gr - Hard Cast Lead Fn 20rd 10bx/cs

Underwood 10mm Auto 220gr Hard Cast Lead Fn 20rd ammunition is purpose-built for shooters who demand reliable, heavy-hitting performance in a potent handgun cartridge. Developed for law enforcement, military professionals, and serious civilian defenders, this round delivers consistent ballistics and barrier-penetrating capability that standard jacketed ammunition cannot match. The 10mm platform remains one of the most respected calibers for stopping power and effective range, and Underwood's hard cast lead construction ensures consistent velocity and minimal lead fouling downrange.

The 220-grain hard cast lead flat nose projectile is engineered to penetrate deeply through intermediate barriers—heavy clothing, vehicle glass, and light cover—while maintaining structural integrity and predictable expansion characteristics. Hard cast lead ammunition resists deformation from feed ramps and magazine springs, reducing malfunction risk in semi-automatic platforms. The flat nose profile generates hydraulic shock and tumbling in soft tissue while maintaining trajectory stability, a critical advantage in defensive scenarios where precision matters. Each box contains 20 rounds, with 10 boxes per case for volume shooters and duty personnel who rotate ammunition stocks regularly.

This load is ideal for shooters running modern 10mm semi-automatic handguns, particularly those used in personal protection, law enforcement training, and field defense. The hard cast bullet design minimizes wear on barrels compared to softer lead alloys, making it economical for high-volume practice and qualification courses. Compatible with all standard 10mm chambers, this ammunition cycles reliably in Gen 5 Glock 20/40, Kimber Eclipse Pro, S&W M&P 2.0, and other quality 10mm platforms. Underwood's quality control and consistent powder charges ensure repeatability for precision shooters developing duty loads or personal defense ammunition.