HSM 10MM17N 10mm 240gr Hard Cast Flat Nose – 20rd Box

HSM 10MM17N is a subsonic 10mm Auto load using a 240-grain hard cast long flat nose bullet finished with a Hi-Tek Supercoat. The ammunition is packaged in 20-round boxes, with 20 boxes per case, and the brass is reloadable for handloaders. Measured performance is 1017 feet per second from a 16-inch barrel, producing approximately 551 foot-pounds of muzzle energy.

Key Specifications

• The caliber is 10mm Auto.
• The bullet weight is 240 grains.
• The bullet profile is a long flat nose (hard cast).
• The bullet finish is Hi-Tek Supercoat.
• The measured muzzle velocity is 1017 fps from a 16-inch barrel.
• The measured muzzle energy is 551 ft lbs.
• Cartridges per box: 20 rounds.
• Boxes per case: 20.
• The cartridge overall length is 1.250 inches.
• Reloadable: Yes; recommended rifling twist is 1:36 or faster.

This HSM subsonic load pairs heavy hard-cast projectiles with a protective Hi-Tek coating for consistent feeding and reduced barrel leading, making it well-suited to subsonic target work, range use, and handloading. Its consistent measured performance and reloadable brass appeal to experienced shooters who value dependable, high-quality 10mm ammunition for precision and controlled-velocity applications.