Underwood Ammo 144Underwood Ammo 144 XTP 38Super+P 124gr Jacketed Hollow Point 20 Per Box/10 CaseUnderwood Ammo$21.02
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Underwood Ammo
Underwood Ammo 357 Sig ammunition loaded with Hornady XTP hollow points puts proven terminal performance in your defensive or training magazine. The 124-grain projectile combines Hornady's eXtreme Terminal Performance bullet design—engineered for consistent expansion and deep penetration—with Underwood's proprietary powder and pressure optimization. This is serious centerfire handgun ammunition for shooters who demand reliable function and predictable on-target results, whether you're working through practice drills or building a duty load you trust.
The XTP bullet's construction balances velocity with controlled expansion, giving you the terminal consistency that matters in a defensive round. Underwood's careful attention to powder charge and primer selection ensures each of these 20-round boxes delivers the velocity and pressure characteristics you're counting on. Available in 10-box cases, this ammunition scales to supply your training pipeline or stock your preferred carry load.
Built in the USA and backed by Underwood's reputation for clean-burning powders and precise hand-loading discipline, this 357 Sig load is engineered for accuracy and function across the wide range of modern 357 Sig platforms in circulation. If you shoot a 357 Sig—whether a SIG P226, P229, or other compatible pistol—this round deserves consideration on your shelf.
| Caliber | 357 Sig |
| Bullet Weight | 124 grains |
| Bullet Type | Jacketed Hollow Point (XTP) |
| Rounds Per Box | 20 |
| Boxes Per Case | 10 |
| Brand | Underwood Ammo |
This ammunition is loaded for any firearm chambered in 357 Sig. Common platforms include the SIG P226, P229, and other modern pistols in that caliber. Always consult your firearm's manual to confirm caliber compatibility before loading.
Underwood designed this load with both defensive practice and duty use in mind. The Hornady XTP bullet is engineered for the controlled expansion and penetration needed in defensive applications, though as always, verify any ammunition choice complies with local laws and your department or personal policy.
Underwood Ammo is produced in the USA. They hand-load their ammunition with carefully formulated powders and quality primers to maintain strict pressure and velocity standards.
Each case contains 10 boxes of ammunition, with 20 rounds per box, for a total of 200 rounds per case.
Underwood Ammo
Underwood Ammo 357 Sig ammunition loaded with Hornady XTP hollow points puts proven terminal performance in your defensive or training magazine. The 124-grain projectile combines Hornady's eXtreme Terminal Performance bullet design—engineered for consistent expansion and deep penetration—with Underwood's proprietary powder and pressure optimization. This is serious centerfire handgun ammunition for shooters who demand reliable function and predictable on-target results, whether you're working through practice drills or building a duty load you trust.
The XTP bullet's construction balances velocity with controlled expansion, giving you the terminal consistency that matters in a defensive round. Underwood's careful attention to powder charge and primer selection ensures each of these 20-round boxes delivers the velocity and pressure characteristics you're counting on. Available in 10-box cases, this ammunition scales to supply your training pipeline or stock your preferred carry load.
Built in the USA and backed by Underwood's reputation for clean-burning powders and precise hand-loading discipline, this 357 Sig load is engineered for accuracy and function across the wide range of modern 357 Sig platforms in circulation. If you shoot a 357 Sig—whether a SIG P226, P229, or other compatible pistol—this round deserves consideration on your shelf.
| Caliber | 357 Sig |
| Bullet Weight | 124 grains |
| Bullet Type | Jacketed Hollow Point (XTP) |
| Rounds Per Box | 20 |
| Boxes Per Case | 10 |
| Brand | Underwood Ammo |
This ammunition is loaded for any firearm chambered in 357 Sig. Common platforms include the SIG P226, P229, and other modern pistols in that caliber. Always consult your firearm's manual to confirm caliber compatibility before loading.
Underwood designed this load with both defensive practice and duty use in mind. The Hornady XTP bullet is engineered for the controlled expansion and penetration needed in defensive applications, though as always, verify any ammunition choice complies with local laws and your department or personal policy.
Underwood Ammo is produced in the USA. They hand-load their ammunition with carefully formulated powders and quality primers to maintain strict pressure and velocity standards.
Each case contains 10 boxes of ammunition, with 20 rounds per box, for a total of 200 rounds per case.