Brass brass or nickel brass?
All info is great info, I'll be happy to see what you come up with.
Most recently, I've had success (but no chrono!) going with max load of AA#7 under the 100gr XTP and launched from the pretty stainless Blackhawk. (that's 9.4 grains of AA#7 and loaded to the cannelure)
I'm sure that 2400 will perform well also, given that it's my go-to propellant for .30 Carb loads from my 7.5" B'Hawk.
Attention Brass rats and other reloaders: I really need .327 Federal Magnum brass, no lot size too small. Tell me what caliber you need and I'll see what I have to swap. PM me and we'll discuss.