Additionally, I've found that I get better response out of volume pots (audio and linear taper) by adding an additional resistor between the "ground" lug of the pot and the ground wire/bus in the bass. This effectively limits how "low" the volume pot can go (which also makes it impossible to mute the bass by turning the volume all the way down) but increases the smoothness and gives you more fine-grained control over your volume in a live situation.
For example, with a 500K pot, I would connect one lead of a 50K or 100K resistor to the "ground" lug of the pot, and then connect the other lead to my bass's ground bus. For a 250K pot, I would use a 25K or 50K resistor. I've tested this idea on several basses, and it seems to work well for me.