are you SET on an autoloader?
I bought a Winchester 1300 darn near 20 years ago, and that sucker has it's share of turkeys, deer, and pheasants on it...
the one thing it really blows for is waterfowl... barrel is too short to generate any respectable velocity with steel loads...
I suppose I could get a bird barrel for it, but then again, I have Dad's old Auto 5 with a telephone pole-length barrel on it, and that just does fine...