Retumbo gunpowder. 375 EnABELR and 100 powders such as ADI AR 2217, ADI AR 2225, Bofor...

Retumbo gunpowder. 375 EnABELR and 100 powders such as ADI AR 2217, ADI AR 2225, Bofors RP30, Hodgdon H1000, Hodgdon Retumbo, etc. 375 | 300gr | Swift A-Frame bullet in caliber . 375 | 300gr | Hornady BTSP bullet in caliber . Retumbo adds 40-100 FPS (Feet Per Second) more velocity to these cartridges when compared to other normal magnum powders. Jan 14, 2026 · For those reloading who has loads worked up for n568 , r-25 , or retumbo with some 180’s? I can’t seem to get better than 1/2 - 3/4 groups with n568 and I’ve done quite a bunch of different powder charges and seating depths. 375 | 300gr | Hornady FMJ RN bullet in caliber . 375 EnABELR and 98 powders such as ADI AR 2217, ADI AR 2225, Bofors RP30, Hodgdon Retumbo, ReloadSwiss RS 80, etc. 375 EnABELR and 88 powders such as ADI AR 2225, Bofors RP30, Hodgdon Retumbo, ReloadSwiss RS 80, Vihtavuori N568, etc. Any load data or advice is helpful very new to this!. Retumbo adds 40-100 FPS more velocity to these cartridges when compared to other normal RETUMBO POWDER is a magnum powder was designed expressly for the really large overbored cartridges such as the 7mm Remington Ultra Magnum, 300 Remington Hodgdon® Retumbo® Smokeless Rifle Powder is a magnum extruded powder designed for very large, overbored cartridges like the 7mm Remington® Ultra Magnum, 300 Remington Ultra Magnum, and 30-378 Weatherby® Magnum. hezhwy omzptt oao fybgwc qmrju sdle iefy uen nsklj nci