They seem to shoot softer for the same velocity (defy physics??). They also smell great. I would reload them one time for second shot in doubles back in the days we could just chuck the empties on the ground!
Federal papers have a very loyal following, probably for the reasons stated above. Back in the 1970's, a Federal paper 3 dram 7 1/2 was used by a lot of games shooters around Louisville, KY.
I have also heard that serious still board shooters prefer the 2 3/4 dram 9. I once bought a pick-up truck bed full of once fired 2 3/4 dram 9's around 1980. The man I bought them from said that they came from a still board shoot in Southern Indiana.
There are a lot of published heavy loads for the Federal paper hull and to this day it remains popular with "games" shooters for their back fence loads as the paper hull has considerable room in it for heavy loads of shot.
I reload mostly Federal Gold Medal plastic hulls now but I still love the paper hull. If they were priced the same as other premium shells, they would sell a lot more.
To me, they do seem to shoot a little softer than a plastic hull. The belief among some shooters is that paper compresses upon firing whereas plastic does not resulting in softer recoil.