Jsut read your Point Blank Range.
there is a couple things come to mind.
Some consider point blank up close and personal.
Well I think the def your looking for is somthign I read once about the distance between you and the target you are sighted in for.
Could be 100 yards or 300. Its the distance your sighted in for. If you have to adjust your sights by lowering or raiseing then the shot is not long point blank. I maybe wrong but I think thats what I remember