The older RCBS .45 ACP taper crimp dies, from 70s and 80s (they have the last two digits of the year
stamped on the die next to the caliber designation) are perfect. The recent (probably still current) PLAIN
old Lee .45 ACP taper crimp die is also good. The Factory Crimp with the carbide resizer ring risks oversizing
your bullet, a problem reported by many. The Redding and Hornady current "taper crimp dies" are a
smooth, maybe 1 deg continuous taper end to end. basically will push the flare back straight and nothing
much else. Not ideal, in fact, IMO, to be avoided.
Ask Ian and Brad what they think....they own them and have the short taper type, too. I THINK they both
use the short taper now, but won't speak for them.
Used RCBS tc dies pop up regularly on eBay, and usually they show the markings in a photo of the item.
This one was made in 1981, here is what it looks like inside.
Bill