My first shotgun was an F.I.E SB-1 in .410. I still have it, and it still gets regular use during small game seasons. i used to take out rabbits at 25 yards with it back in my teens, and I have used it more than once with slugs to take out some of the local coyotes at close range. Lots of good memories of hunts with my father are tied to that shotgun. Enjoy the memories you will make with your son, he will always treasure them, as will you.
If I have to explain why I ride, you wouldn't understand. Explaining sex to an alien would be easier than explaining the feeling, one that boils all that is going on in your life down to what really matters each time you are in The Wind. All I can say is, Life is not Life without it.