I have had a RCBS piggyback since 1st sold and have loaded a lot with it.
I also picked up a used Ammomaster Auto that has a lot parts common with the piggyback.
I have seen both of these progressives, along with the Pro 2000 new/old stock, demand big money on ebay lately, so someone must like them.
I have read of the primer slide failures on both the new Pro Chucker 5 and 7, and watched the redesign vid on UR sponsored by RCBS, but haven't seen anything recently about it.
With most makers touting some kind of die quick change arrangement, I just remove the 4 screws that hold the top plate on the Ammomaster/Piggyback to swap calibers..."quick" enough for me.
So RCBS HAD a quick change back then...but just didn't know it, and no longer sells those top plates
I just recently bought a new progressive press, not an RCBS, because I would NOT be using the Uniflow powder measure and the clap trap mechanism that comes with it, and couldn't find a Pro Chucker for sale without it.
Sometimes a "new" design is more complex, with it's own problems and not necessarily better.
Some reloaders liked the primer strips, some not, but they are gone in the newest designs from RCBS
.
I like tube fed primers, but the liability of kabooms scares the company lawyers, another factor considered in design
.
I would love the read some feed back from Pro Chucker owners posted here,