Lanefan
Victoria Rules
Dropping a simple weapon and pulling out something else (wand, potion, another weapon) should usually be free if the item is halfway accessible.
A more complex change such as going from sword-and-shield to bow, however, should take enough time that one might think twice. Ditto for switching from spellcasting to melee and vice-versa. Maybe not full-round actions, but close.
Trying to sheathe (as opposed to simply drop) a weapon and draw another should take a bit of time but not much - easily managed by knocking a set number off your initiative (say, 3 or 4 in a d20 init. system).
Lanefan
A more complex change such as going from sword-and-shield to bow, however, should take enough time that one might think twice. Ditto for switching from spellcasting to melee and vice-versa. Maybe not full-round actions, but close.
Trying to sheathe (as opposed to simply drop) a weapon and draw another should take a bit of time but not much - easily managed by knocking a set number off your initiative (say, 3 or 4 in a d20 init. system).
Lanefan