If you’re loading magnum cartridges, you may be familiar with Hodgdon’s overbore cartridge powder — Retumbo. To learn more, read on and watch the video! About Hodgdon’s Retumbo From the manufacturer’s product page: This magnum, extruded powder was designed expressly for the really large overbore cartridges such as the 7mm Remington Ultra Magnum, 300 Remington […]
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