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12G Mammoth Magnum 3.5 Steel Hevi Load

Ultimate Performance Steel 3 1/2"

Mammoth Steel 3.5” is the ultimate wildfowl load with high velocity and 1 ½ oz of large size steel shot. 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.

42gms/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

42gms/1 (4mm) *High Performance. Steel Proofed Shotgun with Fleur de Lys stamp. Half Choke Maximum.

42gms/BB (4.5mm) *High Performance. Steel Proofed Shotgun with Fleur de Lys stamp. Half Choke Maximum.

*Steel MPS Velocity calculated at Muzzle and falls within MAXIMUM CIP Momentum.

 

High Performance Steel

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.

Technical performance

Velocity x Distance

The following graph shows the relationship between Velocity (MPS) and Distance (M) for the shot selected from the table below.

Cartridge Load gms Shot Size WAD Length mm Muzzle Velocity FPS Velocity MPS V1
12G Mammoth Magnum 3.5 Steel Hevi Load 42 1, 3, BB Plastic 16/86 1460 425

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