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Winchester Defender 357 Magnum Ammo 125 Grain Bonded Jacketed Hollow Point - S357MPDB
Customer reviews have not been posted yet for Winchester Defender 357 Magnum Ammo 125 Grain Bonded Jacketed Hollow Point - S357MPDB, a 357 Mag personal-defense load built around a 125 grain Bonded Jacketed Hollow Point. This Winchester ammo pairs a notched hollow point with a proprietary bonding process, giving shooters a 357 mag ammo option focused on expansion, penetration, and energy transfer as described by the manufacturer.
Why Shooters Choose Winchester 357 Mag
- Personal-Defense Load: Winchester identifies S357MPDB as a 357 Mag personal-defense cartridge using a 125 grain Bonded Jacketed Hollow Point.
- Bonded Bullet Construction: The proprietary bonding process welds the jacket to the lead core, supporting the deep-penetration design Winchester describes for this load.
- Notched Hollow Point: The notched cavity is designed to promote expansion beyond the original diameter while helping transfer energy on impact.
- Verified Ballistics: This 357 mag 125 grain load is listed at 1325 fps with 487 ft lbs of muzzle energy, giving shoppers clear specs for comparison.
- Brass Case: The verified construction includes a brass case paired with a Centerfire / Boxer primer.
- Winchester 357 Mag Option: For shooters comparing Winchester 357 Mag defensive loads, this 357 Defender cartridge centers on bonded hollow point performance.
- Packaging Choices: Offered as Box of 20 / Case of 200, so shoppers can choose a box or case format.
What Customers Say
A customer rating is not available yet because customer reviews have not been posted, share your experience to help other shoppers evaluate this Winchester 357 Mag load.
What is the muzzle velocity of Winchester 357 Mag 125 grain Bonded Jacketed Hollow Point?
The listed muzzle velocity is 1325 fps. The listed muzzle energy is 487 ft lbs.
Is this 357 mag ammo intended for self-defense?
Yes. Winchester identifies S357MPDB as a personal-defense load, and its Bonded Jacketed Hollow Point design is built around expansion, penetration, and energy transfer.
What does Bonded Jacketed Hollow Point mean?
A Bonded Jacketed Hollow Point uses a hollow point bullet with a jacketed exterior and a lead core. In this load, Winchester uses a proprietary bonding process that welds the jacket to the core.
What is the packaging for this Winchester ammo?
The verified packaging is Box of 20 / Case of 200. That gives shoppers a standard box option or a case option.
What case and primer does this 357 Defender load use?
The verified specs list a brass case. The primer is Centerfire / Boxer.
How is this different from basic range ammunition?
This load is positioned by Winchester for personal defense and uses a bonded, notched hollow point bullet. Basic range ammunition is typically chosen for practice, while this Winchester Defender load is built around defensive bullet performance.
About Winchester 357 Mag
This 357 Defender cartridge uses a Bonded Jacketed Hollow Point bullet with a notched hollow point cavity. Bonded Jacketed Hollow Point bullets generally combine an expanding cavity with a jacketed design, while bonding is intended to help the jacket and lead core remain together during penetration.
Winchester describes this load as a rugged personal-defense option built for deep penetration and strong energy transfer. In the 357 Mag category, this type of ammunition is commonly selected by shooters who want a defensive revolver cartridge with controlled expansion rather than a basic range bullet.
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If you are comparing options in the 357 Mag category, this Winchester Defender load adds a bonded hollow point choice to the Winchester lineup. Choose the box for a smaller purchase or look to the case format when you want bulk ammo for a more consistent supply.
| Field | Details |
| MPN | S357MPDB |
| UPC | 020892218864 |
| Manufacturer | Winchester |
| Platform | Handgun |
| Ammo Application | Personal Defense |
| Ammo Type | Bonded Jacketed Hollow Point |
| Caliber | 357 Mag |
| Grain Weight | 125 |
| Quantity Per Package | Box of 20 / Case of 200 |
| Test Barrel Length | Not Provided |
| Muzzle Velocity | 1325 fps |
| Muzzle Energy | 487 ft lbs |
| Ballistic Coefficient (G1) | Not Provided |
| Case Type | Brass |
| Primer Type | Centerfire / Boxer |
| Corrosive | No |
| Reloadable | Yes |
| Lead Free | No |
| Staked Primer | Not Provided |
| Country of Origin | USA |
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