Last reviewed: 2026-04-19 by Jake Terry, FFL07/SOT3, lifelong hunter.
The Winchester Super-X 12 gauge rifled slug puts a 1oz zinc core downrange at 1450 fps from 2-3/4″ hulls, purpose-built for smooth bore barrels and lead-free hunting zones. Winchester Super-X 12 gauge slug ammunition employs Forster-type rifling — shallow helical cuts on the slug body that engage the bore for gyroscopic stabilization without requiring a rifled choke or barrel. The zinc alloy core eliminates lead exposure while maintaining sufficient sectional density for whitetail, hog, and black bear inside 75 yards. Winchester chambers this load with Boxer primers in reloadable hulls, delivering the hard-hitting reliability the Super-X line built its reputation on over decades of field use.
Performance at a Glance
At 1450 fps from a standard field barrel, the 1oz zinc slug generates approximately 1473 foot-pounds of muzzle energy — sufficient terminal ballistics for medium game at woods ranges. The Forster rifling pattern stabilizes the slug through smoothbore chokes, eliminating the need for dedicated rifled barrels or sabot carriers. Zinc construction meets non-toxic shot regulations in waterfowl zones and select public lands, expanding your hunt area without changing platforms.
| Spec | Value |
|---|---|
| Gauge | 12 Gauge |
| Shell length | 2-3/4″ |
| Shot/slug type | Rifled Slug (Forster-type, zinc core) |
| Slug weight | 1 Ounce |
| Velocity | 1450 Feet Per Second |
| Barrel type | Smooth Bore |
| Primer | Boxer |
| Corrosive | No |
| Reloadable | Yes |
| Rounds/box | 5 Round |
| Intended use | Big Game |
| Manufacturer | Winchester |
This zinc slug load bridges the gap between traditional foster slugs and modern sabot rounds — you maintain smooth bore versatility while gaining compliance with lead-free regulations. Hunters working public land with mixed waterfowl/big game opportunities can carry one platform and switch loads by objective. 12 gauge slug options in zinc or copper alloys continue to expand as more states adopt non-toxic mandates for all hunting ammunition.
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 loaded; keep muzzle pointed in a safe direction at all times.
- Verify current federal, state, and local laws regarding slug ammunition and lead-free requirements before transport or use.
- Pattern your shotgun with this load before the hunt — zinc slugs may shoot to a different point of impact than lead foster slugs from the same barrel.
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