I totally agree with what Ted says. The screw that secures the action to the stock, in the pre Bruchet guns, can be difficult to remove. The stock should be clamped firmly, the screw driver must be perfectly sized so as not to bugger the slot and braced hard against the screw to avoid any tendency to slip. Lots of experience removing difficult screws helps to know when just a little more torque will break the screw head and ruin your day.
nial