Both derailleurs that you're using are later Campagnolo designs which were similar to Shimano indexing derailleurs. The top pulleys can float side to side by at least 1mm. This allows the chain to self center on the sprocket.

I have an old Simplex SX610 RD that index shifts a 12-28T 8 speed Shimano cassette without any problems. It has a floating top pulley (I had to file a little metal off of the travel stop so that the derailleur could span 8 sprockets).




The problem that I had with the Victory RD was no matter which Campy approved/recommended chain, freewheel, insert, shift cable or Synchro lever version that I tried, it wouldn't stay adjusted.

It would index fine on the smaller sprockets but would start to drag, hang or skip on the larger ones. When I fixed that, the same thing would happen with the smaller cogs.

I'm running Campy and Shimano indexing derailleurs on a number of bikes with Simplex or Campy retrofriction levers. They shift almost as well as true indexing levers plus there's no click stops.

verktyg

Chas.