JNRBRONC --
I understand your frustration in the call from your county SO, but the state mandates we attempt to make contact with the owner in case something did indeed turn up. Missing/stolen items are entered into the NCIC (National Crime Information Center) where a serial number or VIN that is ran through the system will create a "hit" (or locate) to the originating agency who entered the item.
Now you ask, why they call? Because Joe Blow who had his truck broken into and rifle and pistol stolen out of it, reported the guns stolen, entered into the system and waited, much like you. However, Joe Blow didn't listen when the officer told Joe Blow to call if they turned up somehow. 5 days later, Joe Blows brother in law turns up with those guns and says man I told you I was gunna borrow those. Joe blow now has his guns back, but didn't think to call law enforcement and say I have my guns back and it was a misunderstanding. Instead thinks Joe Blow and/or brother in law is going to get in trouble for reporting them stolen.
This happens more often than not with vehicles as well. Sir/Ma'am, is your truck still missing that was stolen from you last May. "You know what, I forgot to tell you guys, my son had taken it to get worked on at the farm" or "I forgot I had told my daughter she could take the car to college for her friends graduation." You think how in the hell does one not just call and clear it up? Trust me... more often than not.
But guns require a yearly check. DSMPD recovered a shotgun reported stolen to our department in 1985 about a month ago. Trust in the system, something may turn up, but not always. Apologize for the calls tho... it's just the job..