Good pellet rifles cost money, about as much as a centerfire in some cases. RWS's can be accurate, but if you are serious I would look at Beeman or something along those lines. Webly & Scott make some really nice guns as well.

2 inches at 50 yards isn't bad for a pellet rifle though, especially a cheaper one. That is long shot for a spring air. Some .22 rimfires don't shoot much better than that.

Keep in mind that single stroke spring air guns, especially the magnums (900 fps +) have some serious forward recoil to them. If you don't get a scope made for it these guns will destroy them in short order. I have also had problems with keeping the mounts tight.

They also make pre-charge air guns that work similar to a CO2 gun or paint ball guns. They have a built in tank that you charge with high pressure. These are some of the most accurate guns and they have no recoil. They are far from cheap as well. I believe a lot target guns are this type. I used to have one that was a combination of a precharge and single stroke pump. I believe it shot around 1100 fps with little recoil.

As far as more affordable air rifles go, the pump Benjamin rifles are pretty decent and come in larger calibers. I don't know what the newer ones are like but my grandfather had one for years and now one of my cousins has it and it still works. It is probably 30 years old.

Paul