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12G Super Steel

Non Toxic Steel Wild Fowl Loads

12g Super Steel. This high velocity Steel load is suitable for use in standard 2 ¾” chambered guns in shot sizes 4 and 5. The larger size shot 3 should only be used in high performance steel shot proofed guns with barrels and chokes designed for steel loads.

32gms/5 (3mm) Standard Performance, Modern Nitro Proofed Shotgun, Half Choke Maximum

32gms/4 (3.25mm) Standard Performance, Modern Nitro Proofed Shotgun, Half Choke Maximum

32gms/3 (3.5mm) *High Performance, Steel Fleur de Lys stamped Shotgun, CIP regulations state no choke restrictions however we strongly advise Half Choke Maximum


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



Standard Steel
Standard Steel ammunition can be used in any shotgun (other than Damascus/twist barrelled guns), in good order bearing any London or Birmingham proof symbols 1954 onwards. For pre 1954 shotguns guidance will be needed from the British Proof Authority. The shotgun must be chambered for the case length of the ammunition as a minimum. Longer chamber lengths can be used with shorter ammunition.

*High Performance 
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, our 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 Super Steel 32 3 PIastic 16/70 1430 410 HP
12G Super Steel 32 4, 5 Plastic 16/70 1400 400

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