Hornady Subsonic 338 ARC Sub-X ammunition delivers quiet, accurate performance below the speed of sound—ideal for suppressed shooting, hunting in noise-sensitive areas, or tactical applications where a low report matters. This load pairs a 307-grain Sub-X bullet with powders optimized for subsonic velocity, giving you the stealth of a suppressed rifle without the sonic crack of supersonic rounds. Each box contains 20 rounds loaded to consistent ballistics lot to lot, so you get the accuracy and reliability Hornady is known for, whether you're running a suppressor or not.

The Sub-X bullet is engineered to expand reliably at subsonic speeds, a challenge most rifle rounds struggle with. Its lead core, gilding metal jacket with long grooves, flat profile, and patented Flex Tip insert work together to initiate and control expansion even at lower velocities. That design philosophy makes Subsonic ammo a serious choice for hunters and shooters who need their subsonic loads to perform like full-power ammunition does—not as a compromise, but as a purpose-built alternative.

Compatible with modern 338 ARC platforms from manufacturers including Aero Precision, Ballistic Advantage, CMMG, Faxon, and Seekins Precision, this ammo feeds reliably in any properly headspaced 338 ARC rifle. The powder selection also produces a low flash signature, so muzzle signature stays minimal whether you're suppressed or bare-muzzle, and the high-quality cases and primers ensure consistent ignition and safe performance shot after shot.

Hornady Subsonic 338 ARC Sub-X ammunition delivers quiet, accurate performance below the speed of sound—ideal for suppressed shooting, hunting in noise-sensitive areas, or tactical applications where a low report matters. This load pairs a 307-grain Sub-X bullet with powders optimized for subsonic velocity, giving you the stealth of a suppressed rifle without the sonic crack of supersonic rounds. Each box contains 20 rounds loaded to consistent ballistics lot to lot, so you get the accuracy and reliability Hornady is known for, whether you're running a suppressor or not.

The Sub-X bullet is engineered to expand reliably at subsonic speeds, a challenge most rifle rounds struggle with. Its lead core, gilding metal jacket with long grooves, flat profile, and patented Flex Tip insert work together to initiate and control expansion even at lower velocities. That design philosophy makes Subsonic ammo a serious choice for hunters and shooters who need their subsonic loads to perform like full-power ammunition does—not as a compromise, but as a purpose-built alternative.

Compatible with modern 338 ARC platforms from manufacturers including Aero Precision, Ballistic Advantage, CMMG, Faxon, and Seekins Precision, this ammo feeds reliably in any properly headspaced 338 ARC rifle. The powder selection also produces a low flash signature, so muzzle signature stays minimal whether you're suppressed or bare-muzzle, and the high-quality cases and primers ensure consistent ignition and safe performance shot after shot.