That seems a little high to me but what do I know. I have no use for a slug gun. Way back when Uncle Sam wasn't paying me much and I created little humans that I had to clothe and feed money was tight. I had a 12 ga that I used to hunt deer. I certainly couldn't afford a rifle so buckshot and punkin' balls would have to do. I thought about getting a slug barrel but the aprox $75 at the time bought a lot of diapers.
It appears you're happy and that's all that matters. Congrats on your multi-purpose purchase.