Clean the rifle before you go to the range. Then use a dry patch or two to make sure bore is dry before shooting. You dont want oil in bore when fireing because this causes higher pressures in bore. There is always a debate about break in. I like to fire a slow string of three and then run a patch or two of bore cleaner down the barrel followed by a couple of dry patches. By then the barrel should have cooled down for my next string of three slow fires. I start at 50 yards to get on paper then move back to 100 yards to finish zeroing my scope. This can take anywhere from 9 to 15 shoots depending on how well I bore sited the scope at home. Use good ammo for this and you will be happier. Then I go home and clean the heck out of it.(That is a whole other discussion). Once cleaned well a light coat of oil or anti-rust product in bore and all metl surfaces.
Later you can choose 3 or 4 differant brands and bullet weights to figure out what your rifle likes/shoots the best. (see how easy all this is) Hope this has been helpful.