If you want an inexpensive scope...I have bought a couple of Tasco 2.5X shot gun scopes at Walmart. I have had them for a while, but have not worked with them a whole lot to tell you how well the adjustments track. I do not crank on scopes like this very much. Once I have them sighted in, I leave them set. They seem to be rugged; they are made for shot guns anyway and I have not had any problems with shooting loose. They were about $40/each, I believe. They are a duplex with a circle. They have a 5" eye relief and I have found they are good out to 100 yards or more for deer sized targets. There are definitely better scopes out there, but for a cheap scope they work pretty well. I have mine on a 357 Max and a 44 mag rifle. I think the 2.5X is plenty for 100 yards, but I also think that 10X is plenty for 400 yards on varmints and 500 yards on deer sized targets. Good Luck and Good Shooting