I've had a "cowboy" hat for a couple years. It's wool felt, pretty nice quality, but the fit is just a touch too small. Is there any way to "stretch" it a bit so that it fits more comfortable, and will get some decent use instead of being a shelf queen?

It's not a matter of the headband or chin strap being too tight, the actual crown of the hat is snug. I know if a wool cap is too large you can dunk it in hot water and then wear it for a while until it "shrinks" to your head. What about the opposite direction?