RE: 30yards at a redsquirrel...
I have shot a few from my stand early in the season when things were slow, but I miss more than I hit. I shot one's tail off once when it was facing me and had its tail up. I pinned the tail to the tree stump it was onwith my judo point and the squirrel ran off. I kind of felt bad for that one but it was hilarious at the same time.
Anyway, good shooting and I hope you don't have any more problems with squirrels in your house. That can become a major pain pretty fast.