Hi, I just picked up a used Leupold 3x9c x50 at a good price and plan on putting it on a Ruger 10-22 for squirrel hunting. I have heard that big game scopes need to have there parralax reset for the types of ranges that using a 22 on squirrels will present(15-75 yards) Yes ,NO? I think technically that it might be better to do that but in reality is it a big deal? What type of point of impact change would result from using the scope just like it is ?Idont know if the parralax is set at 100 yards or 150 yards at the factory.Thanks ,Craig