The Gun Counter

Anyone know of a reloading manual that has data for this cartridge?

I've got Speer 14, Lee 2nd, and Hornady 8th, and they don't have much. I found some data in one of them, but I'd like more than one source of data to cross check my loads.

Handaing magazine had a write up not very long ago. I can't find my issue and do not know if they have archive online.