I salvaged a 1950-1954 model from a garage and am trying to fix it up. ther spring is strong but when i fired it , it was like poof , hardly anything without a pellet and hardly fired a pellet. I cleaned the inside of the barrel today and it fired much better but way below the 1050 fps it should. Observing where the cocking lever pushes the spring back i noticed that there is spring ahead of the part that pushes the spring when you cock it as well, is this normal?