Gamebore Mammoth 3" Steel

Magnum Steel 3” is available with 36grams of Steel in shot sizes 1, 3 and 4. This cartridge uses double based propellant exclusively imported from the USA. This ensures Gamebore uses the latest advances in steel powder technology to offer truly High Performance steel loads.


36gms/4 (3.25mm) *High Performance. Steel Proofed Shotgun with Fleur de Lys stamp. CIP regulations state No Choke Restrictions however we strongly advise Half Choke Maximum

36gms/3 (3.5mm) *High Performance. Steel Proofed Shotgun with Fleur de Lys stamp. CIP regulations state No Choke Restrictions however we strongly advise Half Choke Maximum

36gms/1 (4mm) *High Performance. Steel Proofed Shotgun with Fleur de Lys stamp. CIP regulations state No Choke Restrictions however we strongly advise Half Choke Maximum


High Performance Steel ammunition can only be used in shotguns bearing a CIP Fleur de Lys proof mark. CIP recommends a MAXIMUM choke of half (.5mm) for shot sizes 4mm and larger. Please see above for Gamebore's own recommendations based on product performance, experience and safety.

All cartridges should be stored at room temperature in a dry location. Adverse temperatures may affect performance. Do not expose to extreme temperatures.

• 36 Gram
• 1,3 or 4 shot
• 1460 fps
• 25mm head
• 76mm