Programming chips in bulk

[Heckler]

depending on your chip type (surface mount or through hole) and pin count (20 pin or less)
get you a Microchip "Low Pin Count Demo Board" install a 20 pin zif (zero insertion force) socket and a right angle header on the bottom (because it won't fit on the top after you install the zif socket) then use a Pickit2 or a pickit3 to sequentially program them. I can program a chip in <10 seconds including swapping to the next chip.

just one possibility