Im searching for a nice pump .22. Found one near my cabin at a gun shop for $275 otd. Thats cheaper than anywhere else 
Ive found. Only problem was it was a smoothbore. I want the accuracy so I put it down but Im kinda regretting it now. So, is the accuracy of a smoothbore vs rifled barrel that much worse. Furthest Id probally shoot it would be 50 yards at 10" targets. 

A .22 smooth bore would not be very accurate at all I would think. I have no reference personally but think of shooting slugs out of a smooth bore shot gun compared to a slug barrel

It did have s,l,lr stamped on top so Im thinking it was a rifled barrel just leaded up. 

Wow that would mine some bad leading if you can't see any rifleing. Good luck if you get it hope it is an easily fixable problem