Just for fun.
Let say you have your rifle on sandbags and place a target right up against your muzzle. Lets say, just for fun, you can see the target bullseye clearly in your scope. Line up the bullseye in the crosshairs and take a shot. If your rings are 1.50" your line of sight will be 1.5" above the muzzle and the bullet hole is going to be approx 1.5" low.
Now, leaving your rifle on the sandbags, remove scope and add 1/2 spacer to base lifting it to 2" .Your line of sight will be 2" above the muzzle. Line up bullseye in crosshairs and take a shot. The bullet hole will be approx 2" low.
