Unloading to 0 in Abaqus/Explicit

I am having trouble with an unload step (after applying a pressure) in Abaqus/Explicit. The geometry isn't unloaded to the same extent in comparison to the same simulation in Abaqus/Standard (i.e. the residual stress values at the end of the unload step). I've used a smooth step (which goes from 0 to 1 in 0.2 increments), but the simulation doesn't reach a full unload before beginning the next step of another loading cycle. Is there something else in the step definition that will help in achieving an accurate unload?