My rifle is a .358 Norma Magnum that shoots a .375 bullet. It loads a lot more powder than a standard .375 and speed is also a lot more able. Grouping and accuracy is excellent and better that the .375 H&H.
Problem: No commercial Cartridges or casings.
Does anyone know how the process works to "fire-form" casings. I need to know about the amount of powder to use when this is done. Any advice welcome.