c95124
The angle of the dangle for the Sear and the Hammer Ledge are super easy to get wrong.
Fromm the picture of the Trigger/Bolt spring, the trigger side has been flattened out and does not provide sufficient pressure. Also possible the trigger sear has been "rounded" over and does not set square on the hammer Ledge. And or the hammer ledge has been subject to incorrect "adjustment".
The fix is not something you "eyeball" unless you've done a hundred or so. The gun should be looked at by a competent Smith. Getting the correct "angles" also requires a special "Jig." At the minimum, your Trigger/Bolt spring needs replaced. A Uberti Trigger/Bolt spring will suffice nicely.
Stay Safe Out There
PS: When doing SA action work, I have also used Pietta Trigger/Bolt springs for a light but crisp action.