I wouldn't use anything under a .357. I'd recommend a good .357 or better yet a .44 mag for deer and load it with .44 specials for defense use. A .41 mag would be perfect but the ammo is hard to find. Are you planning on reloading for it?
Sometimes you earthlings REALLY amaze me!
If you are looking to hunt don't buy a snubby. I have a S&W 586 with a 6 inch barrel. Great gun. 4 inch barrel is good for defense. Not sure about hunting with a 4" though. Someone with more hunting experience is sure to share some wisdom.
Romans 1:16 I am not ashamed of the gospel, because it is the power of God for the salvation of everyone who believes: first for the Jew, then for the Gentile.