Gamebore
GameboreMammoth Magnum Steel 3″ 12Ga
From £164.25 / 250
Mammoth Magnum Steel is the ultimate wildfowl load with high velocity. This cartridge uses double based propellant exclusively imported from the USA.
High Performance Steel | 36gm 1,3,4 & 42gm BB,1,3
For HP Steel cartridges, ensure the gun is suitable for HP Steel and is stamped with a Fleur de Lys symbol. Proof House guidance suggests a maximum of half choke is used for all steel cartridges.
| 36 | Plastic | 1 | £85.00 | £348.00 | £657.00 | 12 |
| 36 | Plastic | 3 | £85.00 | £348.00 | £657.00 | 20+ |
| 36 | Plastic | 4 | £85.00 | £348.00 | £657.00 | 3 |
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