If you do a search, you'll find that there are quite a few cases of oversize chambers in that caliber. Unfortunately, it was a limited run and they are about gone. H&R doesn't feel it's an issue, but as a reloader I was very disappointed by my first and second ones. Luckily, I purchased through Davidson's, so their lifetime Guarantee saved me since H&R wouldn't. I was using my LEE holding base (or you can use the 3-jaw chuck w/ drill base) and chucked them up in a drill and use some 000 steel wool touched lightly to the sides. It's just cosmetic, but shines them up pretty good. Some use brasso, but it's not recommended due to ammonia content. It can cause premature brass failure due to brittleness. If you want em shinier than the steel wool, you'll have to use some Jewler's rouge on a rag and spun against the case sides or Flitz.