http://data.hodgdon.com/cartridge_load.asp
Check the powder manufacturers website.
I think I would start around 3.1 grains of powder (about half-way between the two spreads [2.1 - 4.0 grains] reduced by 10%.
You will hardly ever find the exact recipe for the exact components you have on hand, unless you buy every thing all at once.
Welcome to The Firing Line. Be careful, check your measurements and weights twice and have fun. These guys are pretty darn helpful here when you have questions.