I am just getting started in tactical shooting and have about $600 to spend on a rifle. My local Wal Mart has Remington 770 and 700 models in various calibers along with a Savage (I am not sure of the model). All the guns I looked at had scopes. The Remington rifles were $450-500 and the Savage was $400. Can I get some suggestions from you more experienced marksmen on which rifle/caliber to start with?