Stevehaun, The reason for the gouges is that when reaming a choke, use only minimal cuts, like .002 at a time. Secondly, the mistake the guy at Gandermountain made, was reversing the reamer. One particular point that Ralph Walker made, was that the reamer must be turning clockwise as it is pulled out. Or, as Ralph says in his literature, it will cause gouges. I know, I did it on one barrel while learning. Because I was taking more out, I worked those gouges out getting to the dimensions I wanted.
I have bought the reamers, several sizes from Brownells, and never had a problem one with them. Take care of them, use lots of oil while cutting and clean them frequently while opening chokes. With care and patience, and a lot of measuring, one can do an admirable job. And for all of us gun nuts who do open chokes, it allows us to cut to get the pattern we want. There can't be enough good said of that practice.
Lenard