Description

Buy Hodgdon Retumbo Smokeless Gun Powder

Hodgdon Retumbo is in stock now at Primers Reloading, giving magnum rifle reloaders a powder built for the biggest, most overbored cartridges on the market. Retumbo was designed to add extra velocity to large-capacity cartridges, and it has earned a loyal following among long-range shooters and big game hunters who load for cartridges like the .300 Remington Ultra Magnum and .338 Lapua Magnum.

What is Hodgdon Retumbo?

Hodgdon Retumbo is a slow-burning, extruded magnum rifle powder. “Extruded” means it’s shaped into small cylindrical grains, and “magnum” means it was built for cartridges with big cases and relatively small bores, where a fast-burning powder simply can’t do the job. It’s part of Hodgdon’s Extreme Rifle Series, a line of powders made to stay consistent when temperatures rise and fall. Hodgdon makes Retumbo in Australia.

Think of it like the difference between a sprinter and a marathon runner. Fast powders burn all at once, while a slow powder like Retumbo keeps pushing the bullet all the way down a long barrel, which is exactly what a big magnum case needs.

Which cartridges use Hodgdon Retumbo?

Hodgdon Retumbo was designed for very large overbored cartridges, including:

• 7mm Remington Ultra Magnum
• .300 Remington Ultra Magnum
• .30-378 Weatherby Magnum
• 7mm STW
• .338 Lapua Magnum
• .300 Norma Magnum
• 28 Nosler
• .300 PRC and 7mm PRC

Reloaders also report using it in several other cartridges. Always check Hodgdon’s published load data for your exact cartridge, bullet weight, and primer before loading, since not every cartridge is listed for every powder.

Why reloaders choose Retumbo

• More velocity in big magnums – Hodgdon says it adds about 40 to 100 feet per second compared to other normal magnum powders in these large cartridges.
• Temperature stable – As part of the Extreme Rifle Series, it stays more consistent in hot and cold weather, which is great for hunters loading ahead of the season.
• Low velocity spread – Reloaders report tight extreme spread and standard deviation numbers with heavy magnum bullets, which helps with long-range accuracy.
• Consistent lot to lot – Shooters often mention getting the same performance year after year.

Available sizes

• 1-pound container – Great for working up a new load or topping off your bench.
• 8-pound container – Best value for high-volume magnum reloaders, since big cases use a lot of powder.

Why buy Hodgdon Retumbo from Primers Reloading

• Trusted, proven brand – Hodgdon is one of the most established names in smokeless powder.
• In stock and ready to ship – No long waits or backorders.
• Right size for your bench – From a single pound to a full 8-pound container.

Shipping information

Smokeless powder is classified as a hazardous material for shipping, so a few rules apply:

• Ground shipping only — never by air.
• Shipped separately from non-hazmat items, and typically cannot ship in the same box as primers due to combined hazmat limits.
• Requires an adult signature (21+) upon delivery.
• Some states and localities have additional restrictions on powder shipments, and per-order quantity limits may apply.

We handle all of the compliance details on our end, so all you need to do is place your order and be ready to sign when it arrives.

Frequently Asked Questions

What is Retumbo best used for?
It’s built for very large, overbored magnum rifle cartridges like the .300 Remington Ultra Magnum, 7mm Remington Ultra Magnum, and .30-378 Weatherby Magnum.

Is Retumbo temperature stable?
Yes. Retumbo is part of Hodgdon’s Extreme Rifle Series, which is built to keep velocities more consistent across hot and cold conditions.

Where is Retumbo made?
Hodgdon manufactures Retumbo in Australia.

Is Retumbo a good choice for a small cartridge like .223?
No. Retumbo is a very slow-burning powder made for large-capacity magnum cases. Always use a powder that’s listed in published load data for your specific cartridge.

What sizes does Retumbo come in?
It’s available in 1-pound and 8-pound containers.

Can smokeless powder be shipped to my state?
Most states allow direct shipping, but some states and cities have additional restrictions or quantity limits. Check our shipping policy or contact us before ordering if you’re unsure.