I was actually surprised the first time I shot my 500; I was expecting a lot more recoil. although it could be because it fits my hand really well. I have the 500 with the 8 3/8" barrel and was shooting 350 gr rounds. It goes back more into your hand than it goes up. Overall it's a fun gun to shoot, but 40 rounds will make your hand sore for a few hours.
In case you're interested, here's a video of the first 5 rounds I shot. As you'll see, not all that much recoil.