>...Since you have the D300 do you shoot jpg or raw at sporting >events like a football game...
I shoot jpg. I tend to shoot a lot of frames, and the files are a lot smaller. I'm not necessarily recommending shooting jpgs, I'm just saying that's what I do, and the jpgs work out fine for my use.
I'll come home from a game with hundreds of shots, most of them flawed in one way or another. If you saw every photo I took, you'd think I was a terrible photographer. But I discard most of them, and the good ones look pretty good. If I show people just the good ones they think I'm a really good photographer.
Shooting action sports is tough. Not only are there the technical challenges, it's difficult to anticipate when, exactly, you want to trip the shutter and where, exactly, you want the camera to be looking. One nice thing about digital is that you can set it to continuous high speed, and in a series of shots you might get a good one. You can throw the rest away and it costs you nothing.