Very good tip. I have found the European Mausers generally prefer bullets in the 190-200 grain range (issue ammo used 196 grain), while the Turkish rifles used a load with a 150-something grain bullet at higher velocities. Using one load in the other rifle will show different POI. So I handload accordingly, depending onthe rifle.
Plenty of data out there. I'd check the bullet and powder manufacturer's data sites first if you don't have the manuals. I like to cross-check at least three sources, to make sure they all agree fairly closely - any load that differs greatly from the others, I avoid. Mistakes DO get published from time to time.