At my family farm we have a lot of starlings and house sparrows that need to be shot. I've shot several with a bolt action .22 with CCI bird****, but it doesn't give reliable killing power. I need a shotgun to kill these birds on the ground and in the air, but they don't fly very high. I am young, so a 20 gauge or .410 would be best. I want to be able to fire quickly as well, with at least a 3 round tube magazine. Pump action preferred. I'm NOT looking for a pretty, high price shotgun, but one that is reliable and at a price range of 325-500 dollars. Thanks for any help!