Big Bertha was in the hands of my gunmaker because there were some screws I could not move to disassemble it. the master is with right very proud for moving every screw but this time the two screws holding the lock only make it with losses

one screw got a new head by tig welding, the other one was a total loss and get a new replacement

try 3 cases for priming and it work 100%

if you look on the primer you see he never had a chance by the big hammer and the pin

the pins are fixed by common glue what held it in place but crack trusty when the hammer comes

for making wads I order a 24 mm hollow punch because nothing is available here. this cork wad for 24,5 mm signal pistol cartridges would be an option but you cant buy them.