I didn't shoot mine before I polished it, but after I polished it, it would not shoot #7's. I would bet Im the guy Palmetto is talking about. The Man "whos chokes are very popular/successful" on this site, worked on mine all day long one Sat. and it never would shoot FED HW #7'S.
I would shoot yours first. If it shoots good, don't try to fix what aint broke!
On a side note: My Pa had some FED HW#6's, so I tried them just to say I did. HOLY SMOKE!!!! PROBLEM SOLVED!!!!!
I didn't count the holes cause I didn't need to! Best pattern I'v ever shot!!!!