He got through Marine boot camp which means by definition he wasn't a mediocre shot.
Someday go to Dallas and look out that window where Oswald was. Even mediocre was far more than enough to pull off those shots.
I always has some lingering doubts until I stood there and looked out those windows. I always thought they were really long distance. They weren't. They were 60 to 80 yards with a 10X scope. They were damn easy shots.
The Zapruder film makes the distances look a lot longer than they actually are. It is really not that far when you stand there and look at it.
Oswald’s scope was a 10X?