Hodgdon Retumbo Smokeless Powder
This magnum powder was developed specifically for the very massive overbored
cartridges, such as cartridges like 7mm Remington Ultra Magnum, 300 Remington Ultra Magnum,
30-378 Weatherby Magnum 30-378 Weatherby Magnum, etc. RETUMBO provides 40-100 fps more acceleration to these cartridges.
When compared to other regular magnum powders. Furthermore, it’s an Extreme Powder,
This makes it the ideal choice for hunting big game in all kinds of conditions.