Selecting the correct firearm is half the fun.
I too am partial to the Model 63 for sentimeltal reasons, although the 317 kit gun is a close second. Anything centerfire is a bit of overkill and the racking of my 870 really does nothing to the four legged criters-It DO have the intended effect with da two legged ones though
Possums are fairly easy. Whack them with a stick (or if you've been drinking kick them) and then pick them up by the tail. Throw them where you want to-I like to throw them over the fence of my neighbor with the ^&%$ chickens.