Purchased a 1979 Colt Python 6" blue, beautiful pistol. No sign of wear. Bought from original owner (friend) he advised that the pistol may have had 3 boxes run through it, and the pistol shows that to be true. When I took it to the range out of 50 rounds, 4 were misfires. Fireing pin hit the primer, but no boom. Someone mentioned that it sounded like a "light strike". Can anyone explain a "light strike", it sounds spring related.