OH yes, it is the SR primer and reduced starting loads. H110/296 the worst. You can blow a bullet into the barrel with unburned powder behind it. It is cured by only loading just below or at max.
I also cured it by cutting down .460 brass and using the LP mag primers. I like Fed 155's.
Now a click from a weak hammer spring has to be stopped, dead wrong to ever reduce those springs.
I shoot mostly SA and the first thing I do is to install Wolfe, over power variable hammer springs of 26#. Ruger and BFR springs are about 23# and will take a set to make them worse. I work with trigger springs and surfaces to get to 1-1/2# pulls.
If you shoot rifle rounds from a revolver that uses a LR primer, you should step up to a 28# spring.
I don't know the weight of the SRH spring from the factory. My experience with Ruger springs is that they take a set. I bought them by the dozen when I shot IHMSA because accuracy would fall off so I changed every time I started to miss.
Never loosen the strain screw on a S&W either.
Nothing worse to have a failure in bear country or just deer hunting.