you need an aiming point that is adequate for the magnification of your scope, the higher the magnification allows for a smaller target, a 6 inch colored square at 300 yards is easier to aim on with a 12 or 14 power scope, if you want to shoot at 1 inch circles then obviously more magnification is required, I like small targets, there for I need more magnification, for years 36x weavers at 300 were the catz azz, then I got a 10-50, then a 15-55, and then an 8-80......bottom line is, if your on a budget, glass is expensive, buy good glass and make your targets bigger so you can hold a good solid aim on them.