[NFHale]

https://en.wikipedia.org/wiki/Marksmanship_Badge_%28United_States%29

Gives a good overall view.

[bunster]

Thanks — answers my question. He was a Marksman with an inferior rifle. From Top down: Expert, Sharpshooter, Marksman.

Although he qualified in 1956 as Sharpshooter by the end of career in 1959 he had dropped to Marksman and no evidence that he practiced anywhere in the ensuing years. (Unless in Russia, ha ha)