RE: Scope for .30-06
The first numbers on a scope mean the magnification of eye power,ie 4 times greater than the eye, next is followed by lens size,light transmision and so on, say 30mm,so the scope will say 4x30 mm.That is for fixed power scope,the same applies on vardible power scopes 3-9,1.5-4x ect....Most scope today are a vardible kind 3-9x40mm,3 to 9 times stronger than the eye veiwed thru a 40mm lens.
Don' t worry about the questions you ask,we are all hear to help,welcome to the forum.BBJ