https://www.archives.gov/research/jfk/warren-commission-report/chapter-4.html#marine
Based on this statement from the final report's conclusions...Oswald's shooting actually got worse 
This is based on bench rest firing at a stationary target with a Springfield Armory M-1 Garand 
To accredit Lee Oswald as having been an accomplished proficient sniper based on his Marine training is just plain laughable silliness!
Question for anyone...Who wrote that final report anyway?
Oswald's shooting actually got worse
Stop the presses. Like this is a new discovery? Yes. His scores got worse. In 1956 he was rated a sharpshooter, which is better than most Marine recruits who passed their shooting tests. In 1959, he barely rated as Marksman. But that is still good. To barely be rated as Marksman, you have to hit targets at 200, 300 and 500 yards, using the iron sights. So, hitting a target at 88 yards, with iron sights, does not seem to be beyond his capabilities.
As an aside, I would guess it was not unusual for Marines to do worse three years later if they chose to reenlist. Particularly if their duties do not require using the rifle but something else, like working with radar. Their most intensive training is generally during boot camp. I don’t think they are trained nearly as intensely, if at all, when they reenlist. At least, I have never heard that to be the case. If their skills have deteriorated too much and they will fail their rifle tests, they have to be retrained and retested. But this did not prove to be necessary for Oswald. He passed on his first attempt in 1959, just like he did in 1956.
