Its really about magnification.
With a 60x magnification, you can see 30 caliber holes out at 200 yards clearly, and 224 caliber holes, not as clear. Over 200 yards, I have not had the luxury of having a 200+ yard range.
Spotting scopes are really just telescopes that adjusts the image so that what is up is up, and right is right. There are eyepieces for telescopes that do this, which allows you to use the telescope as a spotting scope.
I remember looking at the Celestron C5, with a 4.5 inch lens. Pretty cheap, though it might not be as well protected from the elements.
Frohickey -- TFL Alumni
SigSauer, if you are listening, MAKE A DOUBLE-STACK 10mm PISTOL!