The old Estate hulls, the ones with the fibre inner base wad, I heard could and did come loose and could lodge in your barrel/s. I do not reload Federal, although I did reload two boxes of Federal papers that I picked up from someone shooting ahead of me one day.
If you want a very good hull for reloading that lasts longer than the new AA's or Nitro 27, STS, use the Remington Game loads. Most have the zinc head, but there are some with brass heads also. They reload much nicer and reload more times than the other Remingtons and AA's.
