Simo Hayha use a model 28 Mosin Nagant with open sights and killed [numbers vary] 500 + Soviets in the 105 War.Roughly 5 a day every day.The Reds used to call the Finish snipers White Death because of their white cammo and deadly accuracy.He killed one Soviet sniper at 600 meters!A Nagant that jams is about as common as a fish that can't swim?A trip to the local gunsmith may be in order...............Harold