RCBS is going to have to clear that one up for you. Email them.
At the
shotshow in January Kent Sakamoto (product manager at RCBS) shows the "Tube Bullet Feeder" that he said was caliber-specific. RCBS, even today on their website, shows in their product listing, only the one caliber products.
Then going to their manual of the tube feeder (on the same site), it would seem to suggest that they are now putting the multiple-caliber feed die in it with all the fingers.
You know what? I'm beginning to suspect that they never even change dies, they only withheld the plastic fingers for other calibers. That probably got some angry complaints, since you can buy the die by itself (with all the caliber fingers) for $28 at Midway.
The Tube feeder is listed in Midway as single caliber, so we I just assumed RCBS made a different die.
You can always order
THIS from Midway, and
THIS from Linens & Things and have have the same thing only your tubes are way longer...36".........But...You have to make your own bushing to smaller caliber tubes to fit. The bushing I speak of is Part 9 in the tube loader manual. You can make one by gluing tubing together (telescoping it til it fits).
On the other hand, you can just get a caliber specific one from RCBS now, while their still available, for the caliber you reload the most. Then wait for the all-caliber one to come out and buy it. Why? Well you will not only end up with all the caliber fingers, you get the bushing, annnnd, you will have two bodies. Two bodies are way more convenient than one. Think about it.
One more thing.....once you know the diameter of 2 tubes RCBS uses you can buy additional long ones from Linen's and Things.....freight-free I might add.
Which progressive are you using?