According to Hornady all the Leverevolution ammo is not loaded with the same powders. Each and every one uses a custom blended powder tailored specifically for that cartridge. The LVR powder marketed by Hodgdon is reported to be the 30-30 ammo formulation which for me is a good thing since that's what I'm using it for.I've not dissected my factory 45-70 LeverEvolution cartridges, but have read that they are packed tightly with a mystery powder that looks fast burning (but no one seems to know for sure). Chuck Hawks, in his on-line blog, thinks it may be a duplex load, since his dissection revealed ball and flat powder.
My loading manuals have lots of recipes, but none that would match factory ballistics. I've finally resigned myself to buy factory Leverevolution cartridges when I find them on sale. I'll save the reloading for all the other bullets in my inventory.
not sure what they use, cause i wont buy leverevolution ammo. cant reuse the brass... that being said, i have excellent results using Varget and AA5744 for light to medium loads. And full power loads i also have great results with H322. All with hardcast 405 grain bullets.
The brass is not shortened much at all and if the cartridge works well in rifles with a FTX bullet it will work just as well with the other bullets meant for the 45-70. I have used 45-70 Hornady brass from LVR ammo with a 405gr Cast bullet and I didn't change anything I usually do when loading with other brass. The ammo worked flawlessly in my Trapdoor and Marlin levergun.I'm reluctant to load Hornady FTX bullets because the cases must be shortened to maintain the OAL. I'm using Varget with 405 grain LaserCast bullets. I have 4198 and 3031 on hand for when I run out of Varget. 2400 is too fast, IMO, better suited to magnum handgun/carbine cartridges.
Back in the day all they had for loading the 45-70 was Black Powder, Unique and 2400. You can use 2400 with great success although I prefer SR4759 and AA5744.