Last reviewed: 2026-04-18 by Jake Terry, FFL07/SOT3, NRA-certified firearms instructor.
The Brenneke Classic Magnum 12 gauge slug delivers proven big game performance through a design unchanged since 1898. Each 2-3/4″ shell pushes a 1-1/8 ounce lead slug to 1510 fps, generating 2460 ft-lbs of muzzle energy at the muzzle. Traditional felt-wad base attachment keeps the slug stable in flight, producing sub-3″ five-shot groups at 100 yards in manufacturer testing. Runs in rifled or smooth bore barrels with chokes up to improved cylinder — verify compatibility before ordering.
Built for the Box
Brenneke manufactures the Classic Magnum with a roll-crimped hull, Boxer primer, and reloadable brass head. The attached felt wad transfers spin from rifled barrels and stabilizes the slug through smooth bores without requiring a dedicated rifled choke. This dual-compatibility design gives deer and hog hunters a single load for mixed barrel setups. Non-corrosive primer and quality control standards ensure consistent ignition across temperature ranges.
Specs at a Glance
| Spec | Value |
|---|---|
| Gauge | 12 Gauge |
| Shell Length | 2-3/4″ |
| Slug Weight | 1-1/8 Ounce |
| Velocity | 1510 fps |
| Energy | 2460 ft-lbs |
| Barrel Type | Rifled or Smooth Bore |
| Crimp | Roll |
| Primer | Boxer |
| Corrosive | No |
| Reloadable | Yes |
| Rounds/Box | 5 |
| Intended Use | Big Game |
| Manufacturer | Brenneke |
This load suits whitetail, mule deer, and wild hog hunting inside 100 yards. Brenneke recommends verifying your shotgun accepts 2-3/4″ shells and checking barrel type before ordering. Maximum effective range depends on shooter skill and local regulations — verify backstop safety before discharge. Browse our full selection of 12 gauge slugs for additional slug weights and projectile designs.
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.
- Keep muzzle pointed in a safe direction. Finger off trigger until ready to fire. Be certain of your target and what lies beyond it. Treat every firearm as if loaded.
- Verify state and local hunting regulations before taking game. Some jurisdictions restrict rifled slugs or require non-toxic projectiles in certain zones.
- This product contains lead, known to the State of California to cause cancer and reproductive harm (Prop 65). Wash hands after handling. Store away from children.
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