To keep the 30/30 carbine light and handy, go with a scope with low to medium magnification (1.5 -7 power) and a medium to small objective (35mm or smaller). A fixed 4X, 1.5-4X or 2-7X are about right. In spite of what some say about iron or even fiber optic
sights, you will easily get another 15-30 minutes shooting time with a good scope. In dim light, grey deer in grey woods just blend in too well. I have used the fiber optics
and they are great in medium light but they don't compare to a bright scope when it's getting dark, near the end of legal shooting time. Also, the magnification helps you to see antlers and points more clearly when you have to get it right to be legal. As for quality, you don't need a premium scope but plan on spending at least $75, preferably more.