I don't think you can get the "full range" that you can with regular barbell benching anyway. The plates on the ends will not allow it.
That's one reason I prefer dumbbell benching over barbell benching. Dumbbells protect the shoulder in two ways:
You cannot go as low thus avoiding loading your shoulder with a heavy weight and putting it at a mechanical disadvantage. (Many guys are not "built" to barbell bench).
With dumbbells your hands and writs are not locked into a predetermined position. You can move the wrists to a comfortable and more natural position. This also helps you avoid long term injuries.