How is that a "fact"?
Oswald's Rifle Practice Outside the Marines
Cite: NARADuring one of his leaves from the Marines, Oswald hunted with his brother Robert, using a .22 caliber bolt-action rifle belonging either to Robert or Robert's in-laws.785 After he left the Marines and before departing for Russia, Oswald, his brother, and a third companion went hunting for squirrels and rabbits.786 On that occasion Oswald again used a bolt-action .22 caliber rifle; and according to Robert, Lee Oswald exhibited an average amount of proficiency with that weapon.787 While in Russia, Oswald obtained a hunting license, joined a hunting club and went hunting about six times, as discussed more fully in chapter VI.788 Soon after Oswald returned from the Soviet Union he again went hunting with his brother, Robert, and used a borrowed .22 caliber bolt-action rifle.789 After Oswald purchased the Mannlicher-Carcano rifle, he told his wife that he practiced with it.790 Marina Oswald testified that on one occasion she saw him take the rifle, concealed in a raincoat, from the house on Neely Street. Oswald told her he was going to practice with it. 791 According to George De Mohrenschildt, Oswald said that he went target shooting with that rifle.792
Marina Oswald testified that in New Orleans in May of 1963, she observed Oswald sitting with the rifle on their screened porch at night, sighting with the telescopic lens and operating the bolt.798 Examination of the cartridge cases found on the sixth floor of the Depository