If the scope is in good shape it should be fine. (Lifetime Warranty) The mounts are also just as important as the scope so don't skimp too much there. A scope must be mounted so as not to put it into a bind in the mounts and tight enough so there is no movement during firing. It also should be mounted so that the shooter is naturaly looking through it when the rifle is mounted and you can see the whole field of view but far enough from the eye as not to get an eye cut from the recoil.
Not sure about he SPL but I think it has to do with the type lense in the scope.