I'm sure this has been asked numerous times before, but how many rounds through a Mini would be considered as "broke in"? My 580 tapered barrel SS has had in the neighborhood of 3-400 rounds run through it.
I really like my Mini, but I would like it more if I could shoot it more often. I've had it over 2 years. I've run 3-4 different kinds of ammo through it, but nothing really "good". One of these days I will.
If it loads easily, functions reliably and hits what you are shooting at stop second guessing it. Most of my guns shot good out of the box, some like my target 10/22 took 2 years before it could be called decent. Ain't no set rule as to when a gun has been properly broken in.