However, this mysterious load density term has been interpreted to mean two entirely different things. When handloaders are speaking of ‘COL’ or ‘Cartridge Overall Length’, It’s generally understood that the length of a loaded cartridge is being referred to. A cartridge, on the other hand, is a complete loaded round of ammunition. A cartridge case is just that and no more. The definition above states “cartridge case”. In general, loads close to 100% density (or even loads where seating the bullet in the case, compresses the powder) ignite and burn more consistently than lower-density loads.” I’ll agree with that, but a bit more information needs to be added to clarify one important point. According to Wikipedia, “Load density is the percentage of the space in the cartridge case that is filled with powder.
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