Underwood Ammo194200443
Underwood Ammo 155Underwood Ammo 155 Xtreme Penetrator 9mmLuger 115gr Solid Monolithic 20 Per Box/10 Case$31.99
Availability: In Stock
The Underwood Ammo 841 Xtreme Penetrator in .44 Remington Magnum pairs serious stopping power with premium construction—a 220-grain solid monolithic copper bullet designed for hunters and handgunners who demand deep, reliable penetration. Loaded to 1530 feet per second and delivering 1144 foot-pounds of muzzle energy, this round combines velocity with a heavy-hitting bullet engineered to punch through tough game at hunting distances. Unlike conventional lead-core ammunition, the all-copper solid design offers consistent expansion and superior ballistic integrity—no fragmentation, no core-jacket separation.
Built in nickel-plated brass cases with boxer primers, Underwood's ammo is reloadable and engineered to the exacting standards serious shooters expect. Whether you're running a suppressor or shooting unsuppressed, this round is rated safe for suppressed platforms. The 220-grain weight and sectional density of 0.171 give the Xtreme Penetrator the weight distribution and momentum needed to drive deep—a real advantage when hunting larger game or in defense scenarios where penetration matters more than expansion.
Each box contains 20 loaded rounds of new production, non-corrosive ammunition. Underwood Ammo builds reputation on no-compromise reloads and factory rounds for the handgunner who runs hot .44 Mag loads. This is .44 Magnum ammunition that performs like it should—fast, heavy, and built to go through.
| Caliber | .44 Remington Magnum |
| Bullet Weight | 220 grains |
| Bullet Construction | Solid monolithic copper |
| Bullet Diameter | 0.429 inch |
| Muzzle Velocity | 1530 feet per second |
| Muzzle Energy | 1144 foot-pounds |
| Sectional Density | 0.171 |
| Case Type | Nickel-plated brass |
| Primer | Boxer |
| Rounds Per Box | 20 |
| Boxes Per Case | 10 |
| Manufacturer | Underwood Ammo |
Yes. The Xtreme Penetrator is rated safe for use in suppressed handguns.
Yes. The cases are boxer-primed brass and are reloadable.
No. The Xtreme Penetrator uses a solid monolithic copper bullet with no lead content.
A case contains 10 boxes of 20 rounds each, for a total of 200 rounds of .44 Remington Magnum ammunition.
SKU: 194201739 • Width: 2.7in • Height: 2in • Depth: 3.2in • Weight: 1.1oz
Availability: In Stock
The Underwood Ammo 841 Xtreme Penetrator in .44 Remington Magnum pairs serious stopping power with premium construction—a 220-grain solid monolithic copper bullet designed for hunters and handgunners who demand deep, reliable penetration. Loaded to 1530 feet per second and delivering 1144 foot-pounds of muzzle energy, this round combines velocity with a heavy-hitting bullet engineered to punch through tough game at hunting distances. Unlike conventional lead-core ammunition, the all-copper solid design offers consistent expansion and superior ballistic integrity—no fragmentation, no core-jacket separation.
Built in nickel-plated brass cases with boxer primers, Underwood's ammo is reloadable and engineered to the exacting standards serious shooters expect. Whether you're running a suppressor or shooting unsuppressed, this round is rated safe for suppressed platforms. The 220-grain weight and sectional density of 0.171 give the Xtreme Penetrator the weight distribution and momentum needed to drive deep—a real advantage when hunting larger game or in defense scenarios where penetration matters more than expansion.
Each box contains 20 loaded rounds of new production, non-corrosive ammunition. Underwood Ammo builds reputation on no-compromise reloads and factory rounds for the handgunner who runs hot .44 Mag loads. This is .44 Magnum ammunition that performs like it should—fast, heavy, and built to go through.
| Caliber | .44 Remington Magnum |
| Bullet Weight | 220 grains |
| Bullet Construction | Solid monolithic copper |
| Bullet Diameter | 0.429 inch |
| Muzzle Velocity | 1530 feet per second |
| Muzzle Energy | 1144 foot-pounds |
| Sectional Density | 0.171 |
| Case Type | Nickel-plated brass |
| Primer | Boxer |
| Rounds Per Box | 20 |
| Boxes Per Case | 10 |
| Manufacturer | Underwood Ammo |
Yes. The Xtreme Penetrator is rated safe for use in suppressed handguns.
Yes. The cases are boxer-primed brass and are reloadable.
No. The Xtreme Penetrator uses a solid monolithic copper bullet with no lead content.
A case contains 10 boxes of 20 rounds each, for a total of 200 rounds of .44 Remington Magnum ammunition.
SKU: 194201739 • Width: 2.7in • Height: 2in • Depth: 3.2in • Weight: 1.1oz