with the chart i saw on arizonagunrunners.com, they 0 all rounds at 50 yds. this gives you a good comparison from round to round, caliber to caliber. imho that is.
on the 9mm the bullet hitting 0 at 50 will be 1/2" to 3/4" high at 25 yds. at 10 yds the rise would be 1/2 the 25 yard rise?
so, with the gun is a steady rest, sand bags and whatever you have to take the human error from the trigger pull, accurate sighting at 10 yards should be 3/8" higer than your sights at 50.
imho again, with the short sight radius of the handgun, it may not be worth adjusting the rear sight from the factory setting. unless you have the equipment, sand bags, bore site, scope to accurately place shots consistentlt at 25 or 50 yds. then the 10 yard shot takes care of itself.