deadin
US Veteran
I still think there was something wrong with the loads. 4.5 gr Unique under a 158 gr cast bullet is about a mid-range load. If there's enough of it left, you might check the firing pin protrusion.
I surprised you didn't scorch your trigger finger. That had to be blowing hot gasses out the side of the cylinder breech gap.
I surprised you didn't scorch your trigger finger. That had to be blowing hot gasses out the side of the cylinder breech gap.