I keep seeing requests on this site, as well as others, for Thunder Bird Cartridge, Inc (TCCI) powder load data. Although I have not seen this powder for sale in a long time, it seems to keep popping up as a gift, Garage sale item, or an estate sale item.
Back in the 1980's I bought and shot quite a bit of this powder. With each shipment TCCI would send out a data sheet. Still have some partial jugs of several of these powders. Attached as a pdf are the copies of TCCI data sheets that I kept in my reloading files.
Perhaps others might have similar data sheets I have not included and can add their information to this thread.
Mustang