[Unclenick]

Garry,

The lighter ones often are shorter shapes that seat deeper using up more of the powder space. That raises pressure, so just when you'd think charge should need to be increased due to lighter bullet weight, the loss of space keeps that from being safe.

5.0 grains of Bullseye was one of the early military match loads for 230 grain hardball. About 825 fps from a 5" tube. Browning used early Bullseye in developing the cartridge, but he intended it to use a 200 grain bullet originally. I don't know what his powder charge was, but the powder changed some in its early years, so it probably isn't a relevant question, now.