HSM Subsonic 10mm 240 Grain Hard Cast Lead Brass Cased Pistol Ammo 20 Rounds A10MM17N. Formulated working with some of the most sturdy and long lasting materials available these 10mm Auto Ammunition through HSM Ammunition will provide you with a product that gives you many years of consistency. HSM Ammunition has been generating high quality merchandise for a number of years and the HSM Subsonic 10mm 240 Grain Hard Cast Lead Brass Cased Pistol Ammunition is their very own means of showing you just how much they are concerned. At OpticsPlanet we ensure that it is our responsibility to get the perfect solution for your specifications and featuring the HSM Subsonic 10mm 240 Grain Hard Cast Lead Brass Cased Pistol Ammunition is one thing that we're happy to offer. Specifications for HSM Subsonic 10mm 240 Grain Hard Cast Lead Brass Cased Pistol Ammunition: Manufacturer: HSM Ammunition Caliber: 10mm Auto Number of Rounds: 20 Bullet Type: Flat Nose (FN) Bullet Weight: 240 grain Package Contents: Hsm Ammunition Hsm Subsonic 10mm 240gr Hard Cast Lead Fn 20rd 20bx/cs