Product DescriptionHodgdon Retumbo is a true magnum rifle powder engineered for very large-capacity cases with relatively small bores. Designed for cartridges such as the .300 Remington Ultra Magnum, .30-378 Weatherby, 7mm Remington Ultra Magnum, and 7mm STW, Retumbo can deliver approximately 40 feet per second more velocity than other magnum powders depending on bullet and primer selection. As an extruded propellant in Hodgdons Extreme family, it is formulated to be insensitive to hot and cold temperature changes for more consistent performance across a wide range of conditions.Product Highlights Extreme-series, temperature-insensitive performance for consistent results in hot and cold weather Extruded magnum rifle propellant optimized for large-capacity, overbore cartridges Designed for popular big magnum cartridges including .300 Remington Ultra Magnum and .30-378 Weatherby Potential for increased velocity (approximately 40 fps) versus other magnum powders (load dependent) 1 lb canister size suited for precision handloading and load developmentSpecs Brand: Hodgdon Product Type: Smokeless rifle powder (magnum) Series: Extreme Powder Form: Extruded Net Weight: 1 lb Manufacturer Part Number: RET1 UPC: 039288506010 Intended Applications: Large-capacity magnum rifle cartridges (e.g., .300 Remington Ultra Magnum, .30-378 Weatherby, 7mm Remington Ultra Magnum, 7mm STW)Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the products manufacturer.