The case head of the .32 S&W/H&R is about the same size as the case diameter of the Nagant cartridge, so the case head will sometimes actually end up moving into the chamber, thus preventing an adequate primer strike.
The head of a .32 S&W/H&R cartridge case is roughly the same size as the Nagant cartridge's case diameter, leading to potential issues with primer strikes due to the case head entering the chamber.