Challenger reload data

I was wondering if anyone has reloaded Challenger hulls in 28 gauge? I've been told that I could use data for Federal Gold Medal hulls. Is this so?
I've loaded Cheddites with the Federal data and had no problems. (I had a LOT of problems with Federal GM but that's another story.)

The issue with the Cheddite hulls is they are quite long and using the Federal 28S1 wad often results in very deep crimps. There is a 28 gauge made by Gualandi that apparently is better in the Cheddite hulls although I've never tried them.
 
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