You are buying a field gun - it is designed to shoot flat - that is 50% above and below your point of aim. Most guns designed for trap utilize a much higher impact point - typically 70 or even 80% above and 30-20% below because trap targets are shot as they are rising and that lets the shooter keep his eye on the bird as he moves the gun. You will typically, with a field gun, need to swing through the bird as you pull the trigger to compensate.
Make sure the gun fits - if you are seeing too much rib, you will be shooting over the bird - if you have to "scrunch" your head down on the stock, the comb is not correct for you.
I owned the RRL in 28 gauge - for me it was a disappointment - Ruger had a lot of issues with early guns mechanically - hopefully, yours is from the point past that.
For ANY of the target games, FIT is critical - and getting properly fitted means more than putting it in the crook of your elbow or shouldering it in the store. If it isn't quite right - don't despair, as there are aftermarket devices which can easily make it fit you correctly.
Enjoy it and have fun!