It is on Hodgdon's website under their Titegroup powder data.
In the actual Nitro-27 shell, Remington used to use Hodgdon Titegroup, however according to Hodgdon, Remington no longer buys powder directly from them. Instead, Remington now use a powder that is made by the same company that makes Titegroup for Hodgdon, and is, for all intents and purposes, the same powder as Titegroup.
The Hodgdon data says to use a Figure-8 wad, but as noted above, the TGT-12s works better (and, that is what Remington actually uses in the Nitro 27) since Titegroup is such a dense powder.
Use the data in the Hodgdon tables and you will be fine.
Click on the link^^^^^^^^^^^^from about a year ago.
FWIW, Winchester and Hodgdon powders (except the Clays) are made by the St. Marks Powder Co. in Florida. They are a division of General Dynamics. Winchester and Remington will most likely get their powder from them.
Federal gets their powder from Alliant, they are both owned by ATK.