My grandfather had an Iver Johnson break top 38 S&W in the Alaskan Gold rush.
Inspired by this, my brother and I bought countless more examples of Iver Johnson break tops 10 or 12 years ago at gun shows. I was getting nice ones for $50 and corroded with broken trigger spring for $20.
I can replace the trigger spring.
I overloaded an IJ 38SW with a hand load that was a 38 Super +P published load.
The latch stretched on the IJ and the action was loose.
There is a tiny part of sheet metal with a hole in it. The hole gets stretched into an oblong shape.
I mentioned something about the latch and pressure and my father, the great gun designing chief engineer, snapped at me, ~~ " That is from bullet friction and recoil on the barrel mass, not pressure ~~".
It took me a while to get my mind around that.
Now I use low friction soft cast bullets or balls in handloads.
I use wimp loads of 1 or 2 grains of Bullseye or Unique.
Here are some of the right bullets