If you're using a calibration disc to calibrate, you're going to get a reference level image, which will appear darker than what a lot of people are used to. For the time being, see if your PJ has different modes and, since you're going to be having some ambient light, I would go with the "bright" image preset if your projector has it. Barring that and assuming you have the brightness set to a level you are happy with (ie. you don't want to go any higher), mess around with the gamma settings. It can be tough to eyeball that, but get it to a point where too low will make the image washed out and too high will make the image too dark. You should be able to see good shadow detail without making the image too washed out. Hope that helps.