Last reviewed: 2026-04-18 by Jake Terry, FFL07/SOT3, lifelong hunter.
The DDupleks Steelhead Monolit 32 12 gauge slug is a solid steel projectile designed for hunters who face thick cover and need predictable terminal performance on big game. Chambered in 2-3/4″, the slug weighs 1-1/8 ounces and exits the muzzle at 1410 feet per second with 2180 foot-pounds of energy. DDupleks machines each slug from non-toxic steel with polyethylene bearing surfaces that reduce bore friction and eliminate lead fouling. The waisted body design provides aerodynamic self-stabilization in flight, and the flat ogive transfers maximum energy to tissue on impact. Safe for all chokes and functional in both smoothbore and rifled barrels, the Steelhead is built for hunters who need one slug that works across multiple shotgun platforms.
Load Profile
The Monolit 32 relies on solid steel construction for deep penetration — the slug maintains sectional density through brush and bone to reach vital organs. The roll crimp secures the payload in a boxer-primed, reloadable hull rated non-corrosive. Each round is DOT-regulated for shipping and complies with non-toxic ammunition requirements in waterfowl zones and lead-restricted areas. The flat ogive creates a larger permanent wound channel than pointed projectiles, and the waisted body sheds turbulence for stable flight out to 100 yards. Polyethylene surfaces contact the bore, protecting both slug and barrel from deformation. The design reduces ricochet risk compared to traditional foster slugs, and the steel construction holds together on angled bone impacts that would fragment softer alloys.
The Numbers
| Spec | Value |
|---|---|
| Gauge | 12 Gauge |
| Shell length | 2-3/4″ |
| Slug type | Solid steel monolit |
| Slug weight | 1-1/8 ounce |
| Velocity | 1410 fps |
| Energy | 2180 ft-lbs |
| Wad/hull | Reloadable, roll crimp |
| Choke | Safe for all chokes |
| Rounds/box | 5 |
| Intended use | Big game |
| Non-toxic | Yes |
| Barrel type | Rifled or smooth bore |
| Primer | Boxer |
| Corrosive | No |
| Manufacturer | DDupleks |
The Steelhead sits in the 12 gauge slugs category and targets hunters who need non-toxic compliance without sacrificing penetration. The 1410 fps launch speed generates flat trajectory inside 75 yards, and the 2180 ft-lbs muzzle energy matches or exceeds many rifle cartridges at typical shotgun ranges. The slug functions in barrels with choke tubes installed — no need to remove restrictions before hunting — and the steel construction prevents bore leading that fouls rifling and forcing cones over time.
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. Keep the muzzle pointed in a safe direction at all times. Keep your finger off the trigger until ready to shoot. Be certain of your target, what is in line with it, and what is beyond it.
- Verify that your state and local jurisdiction allow non-toxic steel slugs for big game hunting. Some areas require steel-free or lead-free ammunition in designated zones. Check current regulations before ordering.
- This product contains steel components. Exposure to steel particles during manufacturing is regulated under California Proposition 65. For more information, visit www.P65Warnings.ca.gov.
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