Posted by David Williamson on January 24, 2017, 6:58 pm, in reply to "Tough to break grade 3"
Mike it is very possible that the firing pins are making the gun hard to open as there were 3 different size firing pins for guns that used bushings.
You might have the longest one and it is not letting it retract far enough when opened. The part that protrudes is the same on all three but the length behind the shoulder changes.