Galling is usually the result of 2 similar stainless steels adhering to each other and trying to rejoin, causing deformities on a microscopic level and increasing friction. The OP's 110 pro probably has S30V blade steel and despite extensive searching, I can't find a reference to the exact steel Buck uses for its lockbars, but something tells me it is 410 or 420 stainless. I'm having a hard time imagining the end of the lockbar removing enough material on s30v tang to turn it into, essentially, a slipjoint, unless the 2 similar steels have been heat treated to the same hardness, which increases the likelihood of galling.
Maybe Jeff can verify if the material was removed from the lockbar, the tang radius or both. A picture of the disassemble knife would be very telling.