Richard: it is possible that the hammer springs have "taken a set" from being compressed for many years while the gun was stored with the hammers cocked. Let the hammers down on snap caps and try again in a few weeks. And try some other loads-that would be a much easier 'cure' than replacing the hammer springs. And BTW: 16g Fulton parts are listed right now on GunsAmerica http://www.gunsamerica.com/976800832/Guns/Shotguns/LC-Smith-Shotguns/Fulton_16ga_Parts_Gun.htm