I had great luck using the FTX, Starline cases, CCI LR primers and between 34.3 and 52 grains of Reloader7 from Hornady's load notes. I also shot some with BP substitute, but didn't get as good of accuracy, although the one I used didn't ever perform well and I've switched from Shockey's extra Gold to 777. Have some loaded but haven't tested yet.
In my .45-70 Buffalo Classic, the most accurate with the FTX and the Interlock hp's was around 46.3 grains. Not too bad on recoil, although it is definitely there. I also download some for my wife at 34.3 grains which kicks very light and I've had no issues with FTF. Good luck.