There are too many variables in guessing velocity -"your" rifle might have a fast barrel or a slow -even medium laf.
Look at your powder manufacturers website -see what they say about that charge w/ the 52gr bullets.Or go to reloadernest and root arond for some info on the bullet/powder charge combo.
You can play around on this site External Ballistics Calculator
get all your info plugged in -velocity -altitude -bullet weight etc. and it will get you very close with your drop sheet 'dope'.
Then go out and verify "your" real world ballistics.