I posted this in reloading for modern rifles, but it is pertanent here as well, as there are large-bore ctg. BP shooters here too.
Data for .45 & .50 cal. ctgs.
25/02/06 07:23 AM Edit Reply

The new Hodgdon 2006 Anual Manual has modern smokeless data for many ctgs. form the .17's on up & including pressure data in PSI or CUP for all noted below except for the .470 NitroExpress.
: 9.3x62
: 9.3x74
: .375 Winchester
: .405 Winchester
: .376 Steyr
: .45/70- any action strength
: .450 Marlin
: .457 WWG mag.
: .45/120 Sharps
: .470 Nitro Express
: .50 Alaskan
: .50-140 Sharps
: These books are pretty cheap for the great data provided.

Daryl