HSM has developed an entire lineup of fine hunting ammunition featuring the time-honored Sierra GameKing/Pro-Hunter bullets. Each caliber's components have been precisely matched to each GameKing/Pro-Hunter bullet to maximize their potential for accuracy and performance. Specifications: 338 Lapua Mag/215 gr/ Sierra GameKing Spitzer Boat-Tail (SGSBT)/20 Per Box/20 Cs
| FireArm | No |
| HazAir | Yes |
| Boxes Per Case | 20 |
| Casing Material | Brass |
| Rounds Per Box | 20 |
| Application | Hunting |
| Caliber | 338 Lapua Mag |
| Bullet Type | Sierra GameKing Spitzer Boat Tail |
| Bullet Weight | 215 gr |
| Muzzle Energy | 4702 ft lbs |
| Muzzle Velocity | 3138 fps |
