HSM’s Subsonic ammunition in .357 Magnum (brand part no. 35724N) loads a heavy 230-grain hard cast flat nose bullet finished with Hi-Tek Supercoat, delivering roughly 1,026 feet per second and 538 foot-pounds of energy from a 16-inch barrel. HSM keeps this loading below the speed of sound while still driving a heavy, hard-hitting bullet, giving shooters a quieter-shooting .357 Magnum option that still delivers genuine penetration. The Hi-Tek coating replaces a traditional lubricant on the cast bullet, cutting down on barrel leading and airborne lead exposure compared to an uncoated cast bullet. HSM recommends a rifling twist of 1:18 or faster, and the load is suitable for both modern rifles and handguns chambered in .357 Magnum. For .357 Magnum shooters who want a heavy subsonic option, this handgun ammunition is built for that role.

Key Specifications

• The chambering is .357 Magnum, a proven, powerful revolver cartridge.
• The bullet weighs 230 grains, a heavy weight well above the standard 158-grain loading.
• The bullet is a hard cast flat nose, finished with Hi-Tek Supercoat.
• The Hi-Tek coating cuts down on barrel leading compared to an uncoated cast bullet.
• Muzzle velocity is listed at 1,026 fps from a 16-inch barrel, a genuinely subsonic loading.
• Muzzle energy is listed at 538 foot-pounds, substantial for a subsonic handgun round.
• HSM recommends a rifling twist of 1:18 or faster for this heavy bullet.
• Cost runs about $1.18 per round, a reasonable price for a heavy coated subsonic load.
• Each box holds 50 rounds, enough for a serious range session.

Frequently Asked Questions

Is this load quieter than standard .357 Magnum? Yes, at a listed 1,026 fps it stays subsonic, reducing the sonic crack a standard-velocity load produces.

What does the Hi-Tek coating do? It replaces a traditional cast-bullet lubricant, cutting down on barrel leading and airborne lead exposure.

Is this bullet built to expand? No, it is a hard cast flat nose built for penetration rather than expansion.

Buy HSM Subsonic .357 Magnum 230gr Hi-Tek HCFN

A subsonic .357 doesn’t have to mean a light bullet, and HSM’s 230-grain hard cast loading proves it still hits hard while staying quiet. Order from our Lubbock, Texas gun shop and it ships fast to your door.