Photo by Matt Blaze
Mushroom pins behave so much like spool pins that their mention will be brief. The only significant difference in the feel of picking spool pins is that the exaggerated rotation of the plug will often not be as abrupt. Since the mushroom pin has a tapered edge on one side, rather than the characteristic ridge of the spool pin, once the top of the mushroom pin clears the shear line the plug will ride down this taper rather than falling over the ridge. This makes for a less abrupt rotation, but the plug will still rotate in an exaggerated manner.
Picking a mushroom pin, you can employ all the same techniques as you would picking a spool pin.
Full credit to: lockpickernetwork.wikidot.com