Wasn’t the sniper Finnish? I believe his name was Simo Haya. Over 500 kills in 100 days. Didn’t he use some light, low report loads “cats sneeze” loads?
Maybe some Russian snipers had higher scores than that.
http://www.kevos4.com/simo_hayha.htm
Full marks for you! The Finns have a sniper competition named after him.
Winter uniforms for both sides were identical. He used to ski down to Soviet soup kitchens, eat their food, then ski back into the woods and shoot them up. He eventually got shot in the face, but bore down and shot back, killing the man who shot him.
He survived the war(s).