Id like to enter the world of small game hunting with an air rifle and was wondering what a good sub $300 air rifle would be? Id like it to be a spring operated one as I dont want to mess with air cartridges. a couple I have been looking at are made by Gamo one is the Gamo whisper and the other is a big cat..both .177 or should I go with something in a .22? also..what type of killing range can I expect out of an air rifle? is it possible to find a sub $300 air rifle and get 30-40 or even 50 effective yards out of it?