Need FFFG load for 45/70

I looked through all my reference books and the only data I could find that mentioned using FFFg black powder was on page 506 of the Hodgdon Data Manual 25th edition.

405 gr lead bullet with 57 grs FFFg for 1300 fps.

All other books/manuals recommend either Fg or FFg.
 
Canuck, for BP reloading there is no recipe, you drop as much powder either with a drop tube or compress the powder until the level is right up to the bottom of the seated bullet, leaving no airspace. If you want a lighter load, use a wad or two to make up for the reduced amount of powder. This charge will differ with every change in bullet or seating depth, and of course case brand as Winchester has more internal cap. then R-P. 3F is okay to try but may produce a harder fouling, and don't forget to use soft 30-1 bullets and Black Powder lube on them. BP loading is diff. then smokeless, it needs diff. bullets, technique and some of this is safety related as airspace in the loaded round is not good, as an example. I wouldn't listen to folks who don't reload BP on this stuff, or people at the Button Hut.
 
follow Ben's advice.

there is scads of info out there as to what works for one or another

one thing to remember, a heavy cast bullet plunking along at 1200-1300fps is going to penetrate like something much more powerful.

You don't need to hotrod it, but you can tweek it for accuracy. some suggest an overpowder wad, followed by a lube wad/cookie, followed by a fiber or card wad, then a bullet. Adjust the powder so when you compress it with the Bell die about 1/8" at least, there is enough room for your wads, cookies and bullet seated so as to slightly engrave the rifling.
tweek from there...

good luck. Fun Stuff!
 
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