I used to go through the 10 to 15 round break in, firing one, cleaning, then two, clean, then three, clean, and so on.
Now, I fire one round, clean it real good, and shoot it. Doesn't seem to make any difference.
I will say this. Doing a "break in" sure doesn't hurt anything, so if you feel better doing it, go ahead. Especially if you have some cases to fireform.