How to use adjustable objective rifle scopes<br>Be sure that your scope is mounted properly. Sighting-in can have been done preliminarily, but additional sighting-in will be desirable after following these steps : Know your rifle. There are actually two optical systems in a rifle scope.
Knowing your rifle means shooting it a lot. 
( z1 mean :ARG1 ( z2 know :ARG0 ( z3 you ) :ARG1 ( z4 rifle :poss z3 ) ) :ARG2 ( z5 shoot :ARG0 z3 :ARG1 z4 :frequency ( z6 lot ) ) )