First 1/2 dozen brake applications, even gently, when cold or wet, result in a violent grab or brake slam. Pulled rear drums and found a broken shoe pin. Replaced with new brake hardware, sand papered linings ( thickness is OK) adjusted and reassembled. Was OK for a short while. Now (winter time in BC, Canada) every time I move the truck, even after keeping inside for few days, BOTH front discs and rear drums grab.

I have not inspected fronts yet, but I am wondering if I have oversize drums or undersize rotors. Or both.
Any suggestions would help.