For context, the French Canon-Obusier 16cm/30Livre - which has a tighter windage, gives 1466 fps with hollow shot/shell and 1186 fps with the solid shot. (The same diameter of shot - the weights in English pounds are 22.05lbs/34.89lbs). The carrying and penetration are better for the solid shot, but initial trajectory is flatter for the shell at closer ranges.

Licorne shell is heavier (quoted as in the ratio of 40 shell/48 shot (trade pounds)), so the 'shell' velocity will be a bit lower, in addition to the lower velocity associated with a looser windage.