Gunworks Ltd
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$110.00 Incl GST

We can not send powder to the North Island or a rural address (South Island)

Dangerous Goods freight charge $20

A magnum powder that was designed expressly for the very large overbored cartridges such as the 7mm Remington Ultra Magnum, 30-378 Weatherby Magnum etc. Retumbo adds 40-100 fps more velocity to these cartridges when compared to other normal Magnum powders. In addition, it is an Extreme Powder, making it perfect for big game hunting under all types of conditions. Available in 1 lb container