I load for .380acp, .38/.357, .45 colt, .454-70, and occasionally .30/30 on RCBS gear that I bought used. Don't be afraid to buy used gear, it never wears out. The only thing that will really hurt it is rust.
As far as my .45/70 goes, I use a 405 gr cast bullet sized at .459" on top of 25 gr of AA5744. According to the folks at Accurate I'm getting about 1300 FPS. If you want a little less oomph, Trail Boss is superb in the .45-70. 14 gr should get you around 1,000 FPS I think.
As Swampman stated, the brass from Hornady LeverEvolution is shorter than spec, about .070". You can reload it, but the only dies that will work for it are Hornady's. I unknowingly bought some at a gun show for what seemed like a great price, I then had to buy a Lee Factory crimp die and shorten it by 1/8" to get it to work. I'm still not sure if it's crimping properly but since I shoot a Handi it's no big deal. On a levergun though, proper crimp is very important.
The greater concern with the shorter brass is load data. Reduced volume means greater pressure and while it's not a big deal in mild loads, if you like to load to the max you have to be a little more careful in your load development.
Anyway, congratulations on your purchase and I hope you decide to take up relaoding. I find it to be a relaxing and rewarding hobby, hopefully you will too.
GH1