Last reviewed: 2026-04-19 by Jake Terry, FFL07/SOT3, NRA-certified firearms instructor.
The 410 rifled slug occupies a specific niche in the shotshell world — delivering centerfire-like velocity and energy from the smallest gauge smoothbore platform. Winchester Super X loads this 2-1/2″ shell with a 1/5oz Foster-Type slug — a hollow-based, rifled-surface projectile designed to engage the bore and stabilize through spin imparted by contact with the barrel. At 1830 fps muzzle velocity and 647 ft-lbs of energy, this load matches or exceeds many pistol-caliber carbine rounds in terminal performance, making it a viable choice for predator control, thin-skinned game at woods distances, and home defense scenarios where over-penetration is a concern and a smoothbore shotgun is your primary platform.
Performance at a Glance
| Spec | Value |
|---|---|
| Gauge | 410 Bore |
| Shell Length | 2-1/2″ |
| Shot/Slug Type | Rifled Slug (Foster-Type) |
| Slug Weight | 1/5 Ounce |
| Velocity | 1830 fps |
| Energy | 647 ft-lbs |
| Barrel Type | Smoothbore (Rifled Bore compatible) |
| Primer | Boxer |
| Corrosive | No |
| Reloadable | Yes |
| Rounds/Box | 15 |
| Intended Use | Big Game, Predators, Personal Defense |
| Manufacturer | Winchester |
The Foster-Type slug uses a hollow base that obturates under firing pressure, expanding slightly to contact the bore and impart stabilizing spin. This design works in any choke constriction, though cylinder or improved cylinder delivers best accuracy. Expect 3-4 inch groups at 25 yards from a fixed-choke smoothbore — tighter with rifle sights or optics. For more 410 loads across shot sizes and slug configurations, browse our full Winchester 410 Ammo selection.
Safe Handling & Compliance
Federal law requires purchasers to be at least 18 years old for rifle and shotgun ammunition, and at least 21 for handgun ammunition. Ammunition cannot be shipped to certain states, counties, and cities — review our ammunition shipping restrictions before ordering. Store ammunition in a cool, dry location away from heat sources and out of reach of unauthorized users.
- Treat every firearm as if it is loaded — muzzle discipline at all times
- Verify gauge and chamber length match your firearm before loading
- This product contains lead, a chemical known to the State of California to cause cancer and reproductive harm — wash hands after handling
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