IMHO - Some of the Herter's Dies, I've seen, were roughly machined and heavily plated. The workmanship and precision were not the equal of the Lyman, R.C.B.S., C&H, and Lee Dies, I am use to.

That being said, the Herter's Dies and Presses were very inexpensive at a time when U.S. Reloading Equipment was very expensive.

I have a Herter's 6.5mm bullet seating Die, with an open 'side-window' that I like to use for making 6.5mm Swedish Mauser ammo.