COL or OAL may be significant for feeding a semi or fitting cartridges into a cylinder. But it is irrelevant for loading the cartridge. The Useable Volume under the bullet is important, but different bullets of different shapes and different lead alloys and different jacket design/thickness and different plating thicknesses will have different Useable Volumes at the same bullet weights and OALs. The way to know for sure is to measure them.

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Certified Curmudgeon