So IM glassing the exact same target with two different scopes(one varible at 10x and one fixed at 20 x both mildot) and playing with MIldot Master slide rule to estimate ranges. My problem is that the 20x(supersniper from Riflescopes.com) reads 6 mils where the 10x(Millett TRS1) reads 3. Are Mil dots only useable at 10X? If so Can I simply take the measurement with the 20x and divide mils by two before using Mildot Master...If this post needs to be moved well then my appligies in advance