Todd,
There is no WAY in heck I would EVER consider running a K- Hornet reamer through that Browning(or in any other Hornet for that matter).
Why?
In 1947 the K Hornet was needed.In 2007 is not.
During the last ten years I have owned three Browning 1885 Hornets. With partially neck sized fireformed brass, loaded with LILGUN powder and the bullet the gun like, I cannot see ANY advantage to a K Hornet in terms of accuracy, velocity OR case life. with the LILGUN and the neck sized brass case life is great and using 40g V-max bullets, accuracy ,trajectory and killing power to well past 200 yards was superb.
Every 1885 Browning Low wall I owned in .22Hornet.,223 and 243 was capable of 1/2MOA groups when fed properly.