Hodgdon Retumbo is a slow-burning, magnum extruded rifle powder engineered specifically for large, overbored magnum cartridges. Designed to excel in cartridges such as the 7mm Remington Ultra Magnum, .300 Remington Ultra Magnum, and .30-378 Weatherby Magnum, Retumbo delivers 40–100 fps higher velocities compared to many traditional magnum powders.

As part of Hodgdon’s Extreme Powder line, Retumbo offers exceptional temperature stability, making it a trusted choice for big game hunting in demanding conditions. Whether you’re hunting in extreme cold, high heat, or variable climates, Retumbo maintains consistent burn characteristics and reliable ballistic performance.

Manufactured in Australia to Hodgdon’s exacting standards, Retumbo is a proven option for reloaders seeking maximum velocity, consistent pressures, and dependable long-range performance from today’s biggest magnum cartridges.

Key Features

• Slow-burning extruded powder for large magnum rifle cartridges

• Designed for overbored cartridges such as 7mm RUM, .300 RUM, and .30-378 Weatherby

• Produces 40–100 fps higher velocity compared to many standard magnum powders

• Part of Hodgdon’s Extreme Powder line for superior temperature stability

• Excellent consistency across a wide range of environmental conditions

• Ideal for big game hunting and long-range applications

• Made in Australia

• Available in 1 lb and 8 lb containers

Specifications

Why You’ll Appreciate This Powder

When velocity and consistency matter most, Retumbo stands apart. Its ability to push heavy bullets faster while maintaining stable performance in extreme temperatures makes it a go-to powder for serious magnum reloaders and hunters who demand repeatable results in the field.