I'm puzzled. If you are drilling your own holes, does it matter what the footprint says?
1mm is standard drill size for stripboard (aka Veroboard), I have been soldering that for years and never noticed any problems. Solder just flows around the wire.
Getting pin or socket strips aligned nicely is perhaps more tricky, some people stagger the holes so that the pins "lock" in the holes, personally I don't like that. I prefer to solder one pin first, then align the pin strip.
Btw, creating a custom set of footprints for pin strips is very easy if you can get the hang of Python scripts. You probably just need to change one line to change the drill size. Or even do a global edit on the the existing footprints.